diff --git a/VECTO Changelog.txt b/VECTO Changelog.txt
index d5ee1b49f3e3a0ded2832d4927c4edcb619e83a9..81cccc3fa47979fae17f7fc7bac866b60bbc336f 100644
--- a/VECTO Changelog.txt	
+++ b/VECTO Changelog.txt	
@@ -5,6 +5,11 @@ VECTO ?.? (future release)
 VECTO 1.1 x (current source - next release)
 
 
+
+VECTO 1.1 beta 4
+- Engine Start/Stop implemented
+- Fixed error in FC interpolation (invalid extrapolation errors)
+
 VECTO 1.1 beta 3
 - FC Extrapolation will abort the calculation
 - Transmission Type selection in Gearbox (.vgbx) file.
diff --git a/VECTO/GUI/F_GEN.Designer.vb b/VECTO/GUI/F_GEN.Designer.vb
index 69ca551288e87c45f1d9fc220d47f215dc26dc90..3c6980d9e2d8de9a12dae6d1aeb73e5b158e3ef0 100644
--- a/VECTO/GUI/F_GEN.Designer.vb
+++ b/VECTO/GUI/F_GEN.Designer.vb
@@ -103,13 +103,18 @@ Partial Class F_GEN
         Me.TextBoxTRS = New System.Windows.Forms.TextBox()
         Me.CheckBoxDynKor = New System.Windows.Forms.CheckBox()
         Me.CheckBoxSCR = New System.Windows.Forms.CheckBox()
-        Me.ChBStartStop = New System.Windows.Forms.CheckBox()
         Me.CheckBoxColdSt = New System.Windows.Forms.CheckBox()
         Me.ButOpenTRS = New System.Windows.Forms.Button()
         Me.ButtonTRS = New System.Windows.Forms.Button()
         Me.ComboBoxGearShift = New System.Windows.Forms.ComboBox()
         Me.TabControl1 = New System.Windows.Forms.TabControl()
         Me.TabPgDriver = New System.Windows.Forms.TabPage()
+        Me.ChBStartStop = New System.Windows.Forms.CheckBox()
+        Me.GrStartStop = New System.Windows.Forms.GroupBox()
+        Me.TBSSspeed = New System.Windows.Forms.TextBox()
+        Me.TBSStime = New System.Windows.Forms.TextBox()
+        Me.LabelSStime = New System.Windows.Forms.Label()
+        Me.LabelSSspeed = New System.Windows.Forms.Label()
         Me.BtAccOpen = New System.Windows.Forms.Button()
         Me.Label1 = New System.Windows.Forms.Label()
         Me.BtDesMaxBr = New System.Windows.Forms.Button()
@@ -128,12 +133,6 @@ Partial Class F_GEN
         Me.Label8 = New System.Windows.Forms.Label()
         Me.Label7 = New System.Windows.Forms.Label()
         Me.TextBoxIncPe = New System.Windows.Forms.TextBox()
-        Me.TabPgStartStop = New System.Windows.Forms.TabPage()
-        Me.GroupBoxStartStop = New System.Windows.Forms.GroupBox()
-        Me.LabelSStime = New System.Windows.Forms.Label()
-        Me.LabelSSspeed = New System.Windows.Forms.Label()
-        Me.TBSStime = New System.Windows.Forms.TextBox()
-        Me.TBSSspeed = New System.Windows.Forms.TextBox()
         Me.TabPgTEST = New System.Windows.Forms.TabPage()
         Me.GrGearShift = New System.Windows.Forms.GroupBox()
         Me.TBpfast = New System.Windows.Forms.TextBox()
@@ -185,10 +184,9 @@ Partial Class F_GEN
         Me.GrAux.SuspendLayout()
         Me.TabControl1.SuspendLayout()
         Me.TabPgDriver.SuspendLayout()
+        Me.GrStartStop.SuspendLayout()
         Me.TabPgKF.SuspendLayout()
         Me.GroupBox2.SuspendLayout()
-        Me.TabPgStartStop.SuspendLayout()
-        Me.GroupBoxStartStop.SuspendLayout()
         Me.TabPgTEST.SuspendLayout()
         Me.GrGearShift.SuspendLayout()
         Me.StatusStrip1.SuspendLayout()
@@ -1026,18 +1024,6 @@ Partial Class F_GEN
         Me.CheckBoxSCR.Text = "Exhaust System Simulation"
         Me.CheckBoxSCR.UseVisualStyleBackColor = True
         '
-        'ChBStartStop
-        '
-        Me.ChBStartStop.AutoSize = True
-        Me.ChBStartStop.Checked = True
-        Me.ChBStartStop.CheckState = System.Windows.Forms.CheckState.Checked
-        Me.ChBStartStop.Location = New System.Drawing.Point(282, 53)
-        Me.ChBStartStop.Name = "ChBStartStop"
-        Me.ChBStartStop.Size = New System.Drawing.Size(101, 17)
-        Me.ChBStartStop.TabIndex = 9
-        Me.ChBStartStop.Text = "ICE Start / Stop"
-        Me.ChBStartStop.UseVisualStyleBackColor = True
-        '
         'CheckBoxColdSt
         '
         Me.CheckBoxColdSt.AutoSize = True
@@ -1090,7 +1076,6 @@ Partial Class F_GEN
         Me.TabControl1.Controls.Add(Me.TabPgColdSt)
         Me.TabControl1.Controls.Add(Me.TabPgHEV)
         Me.TabControl1.Controls.Add(Me.TabPgKF)
-        Me.TabControl1.Controls.Add(Me.TabPgStartStop)
         Me.TabControl1.Controls.Add(Me.TabPgTEST)
         Me.TabControl1.Location = New System.Drawing.Point(1, 107)
         Me.TabControl1.Name = "TabControl1"
@@ -1101,6 +1086,8 @@ Partial Class F_GEN
         '
         'TabPgDriver
         '
+        Me.TabPgDriver.Controls.Add(Me.ChBStartStop)
+        Me.TabPgDriver.Controls.Add(Me.GrStartStop)
         Me.TabPgDriver.Controls.Add(Me.BtAccOpen)
         Me.TabPgDriver.Controls.Add(Me.Label1)
         Me.TabPgDriver.Controls.Add(Me.BtDesMaxBr)
@@ -1113,6 +1100,63 @@ Partial Class F_GEN
         Me.TabPgDriver.Text = "Driver"
         Me.TabPgDriver.UseVisualStyleBackColor = True
         '
+        'ChBStartStop
+        '
+        Me.ChBStartStop.AutoSize = True
+        Me.ChBStartStop.Checked = True
+        Me.ChBStartStop.CheckState = System.Windows.Forms.CheckState.Checked
+        Me.ChBStartStop.Location = New System.Drawing.Point(9, 94)
+        Me.ChBStartStop.Name = "ChBStartStop"
+        Me.ChBStartStop.Size = New System.Drawing.Size(101, 17)
+        Me.ChBStartStop.TabIndex = 39
+        Me.ChBStartStop.Text = "ICE Start / Stop"
+        Me.ChBStartStop.UseVisualStyleBackColor = True
+        '
+        'GrStartStop
+        '
+        Me.GrStartStop.Controls.Add(Me.TBSSspeed)
+        Me.GrStartStop.Controls.Add(Me.TBSStime)
+        Me.GrStartStop.Controls.Add(Me.LabelSStime)
+        Me.GrStartStop.Controls.Add(Me.LabelSSspeed)
+        Me.GrStartStop.Location = New System.Drawing.Point(9, 117)
+        Me.GrStartStop.Name = "GrStartStop"
+        Me.GrStartStop.Size = New System.Drawing.Size(207, 87)
+        Me.GrStartStop.TabIndex = 38
+        Me.GrStartStop.TabStop = False
+        Me.GrStartStop.Text = "Engine Start Stop"
+        '
+        'TBSSspeed
+        '
+        Me.TBSSspeed.Location = New System.Drawing.Point(120, 19)
+        Me.TBSSspeed.Name = "TBSSspeed"
+        Me.TBSSspeed.Size = New System.Drawing.Size(64, 20)
+        Me.TBSSspeed.TabIndex = 34
+        '
+        'TBSStime
+        '
+        Me.TBSStime.Location = New System.Drawing.Point(120, 45)
+        Me.TBSStime.Name = "TBSStime"
+        Me.TBSStime.Size = New System.Drawing.Size(64, 20)
+        Me.TBSStime.TabIndex = 36
+        '
+        'LabelSStime
+        '
+        Me.LabelSStime.AutoSize = True
+        Me.LabelSStime.Location = New System.Drawing.Point(13, 48)
+        Me.LabelSStime.Name = "LabelSStime"
+        Me.LabelSStime.Size = New System.Drawing.Size(101, 13)
+        Me.LabelSStime.TabIndex = 35
+        Me.LabelSStime.Text = "Min ICE-On Time [s]"
+        '
+        'LabelSSspeed
+        '
+        Me.LabelSSspeed.AutoSize = True
+        Me.LabelSSspeed.Location = New System.Drawing.Point(19, 21)
+        Me.LabelSSspeed.Name = "LabelSSspeed"
+        Me.LabelSSspeed.Size = New System.Drawing.Size(95, 13)
+        Me.LabelSSspeed.TabIndex = 37
+        Me.LabelSSspeed.Text = "Max Speed [km/h]"
+        '
         'BtAccOpen
         '
         Me.BtAccOpen.Image = Global.VECTO.My.Resources.Resources.application_export_icon_small
@@ -1294,65 +1338,6 @@ Partial Class F_GEN
         Me.TextBoxIncPe.Size = New System.Drawing.Size(61, 20)
         Me.TextBoxIncPe.TabIndex = 0
         '
-        'TabPgStartStop
-        '
-        Me.TabPgStartStop.Controls.Add(Me.GroupBoxStartStop)
-        Me.TabPgStartStop.Location = New System.Drawing.Point(4, 22)
-        Me.TabPgStartStop.Name = "TabPgStartStop"
-        Me.TabPgStartStop.Padding = New System.Windows.Forms.Padding(3)
-        Me.TabPgStartStop.Size = New System.Drawing.Size(646, 442)
-        Me.TabPgStartStop.TabIndex = 4
-        Me.TabPgStartStop.Text = "Start-Stop"
-        Me.TabPgStartStop.UseVisualStyleBackColor = True
-        '
-        'GroupBoxStartStop
-        '
-        Me.GroupBoxStartStop.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
-            Or System.Windows.Forms.AnchorStyles.Left) _
-            Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
-        Me.GroupBoxStartStop.Controls.Add(Me.LabelSStime)
-        Me.GroupBoxStartStop.Controls.Add(Me.LabelSSspeed)
-        Me.GroupBoxStartStop.Controls.Add(Me.TBSStime)
-        Me.GroupBoxStartStop.Controls.Add(Me.TBSSspeed)
-        Me.GroupBoxStartStop.Location = New System.Drawing.Point(6, 6)
-        Me.GroupBoxStartStop.Name = "GroupBoxStartStop"
-        Me.GroupBoxStartStop.Size = New System.Drawing.Size(634, 319)
-        Me.GroupBoxStartStop.TabIndex = 12
-        Me.GroupBoxStartStop.TabStop = False
-        Me.GroupBoxStartStop.Text = "Parameters"
-        '
-        'LabelSStime
-        '
-        Me.LabelSStime.AutoSize = True
-        Me.LabelSStime.Location = New System.Drawing.Point(23, 55)
-        Me.LabelSStime.Name = "LabelSStime"
-        Me.LabelSStime.Size = New System.Drawing.Size(101, 13)
-        Me.LabelSStime.TabIndex = 2
-        Me.LabelSStime.Text = "Min ICE-On Time [s]"
-        '
-        'LabelSSspeed
-        '
-        Me.LabelSSspeed.AutoSize = True
-        Me.LabelSSspeed.Location = New System.Drawing.Point(29, 28)
-        Me.LabelSSspeed.Name = "LabelSSspeed"
-        Me.LabelSSspeed.Size = New System.Drawing.Size(95, 13)
-        Me.LabelSSspeed.TabIndex = 2
-        Me.LabelSSspeed.Text = "Max Speed [km/h]"
-        '
-        'TBSStime
-        '
-        Me.TBSStime.Location = New System.Drawing.Point(130, 52)
-        Me.TBSStime.Name = "TBSStime"
-        Me.TBSStime.Size = New System.Drawing.Size(64, 20)
-        Me.TBSStime.TabIndex = 2
-        '
-        'TBSSspeed
-        '
-        Me.TBSSspeed.Location = New System.Drawing.Point(130, 26)
-        Me.TBSSspeed.Name = "TBSSspeed"
-        Me.TBSSspeed.Size = New System.Drawing.Size(64, 20)
-        Me.TBSSspeed.TabIndex = 1
-        '
         'TabPgTEST
         '
         Me.TabPgTEST.Controls.Add(Me.GrGearShift)
@@ -1368,7 +1353,6 @@ Partial Class F_GEN
         Me.TabPgTEST.Controls.Add(Me.ComboBoxEngType)
         Me.TabPgTEST.Controls.Add(Me.CheckBoxDynKor)
         Me.TabPgTEST.Controls.Add(Me.ComboBoxEclass)
-        Me.TabPgTEST.Controls.Add(Me.ChBStartStop)
         Me.TabPgTEST.Controls.Add(Me.CheckBoxSCR)
         Me.TabPgTEST.Controls.Add(Me.ButOpenTRS)
         Me.TabPgTEST.Controls.Add(Me.ComboBoxVehType)
@@ -1797,12 +1781,11 @@ Partial Class F_GEN
         Me.TabControl1.ResumeLayout(False)
         Me.TabPgDriver.ResumeLayout(False)
         Me.TabPgDriver.PerformLayout()
+        Me.GrStartStop.ResumeLayout(False)
+        Me.GrStartStop.PerformLayout()
         Me.TabPgKF.ResumeLayout(False)
         Me.GroupBox2.ResumeLayout(False)
         Me.GroupBox2.PerformLayout()
-        Me.TabPgStartStop.ResumeLayout(False)
-        Me.GroupBoxStartStop.ResumeLayout(False)
-        Me.GroupBoxStartStop.PerformLayout()
         Me.TabPgTEST.ResumeLayout(False)
         Me.TabPgTEST.PerformLayout()
         Me.GrGearShift.ResumeLayout(False)
@@ -1880,12 +1863,6 @@ Partial Class F_GEN
     Friend WithEvents ButOpenEMO As System.Windows.Forms.Button
     Friend WithEvents ButOpenEXS As System.Windows.Forms.Button
     Friend WithEvents ButOK As System.Windows.Forms.Button
-    Friend WithEvents GroupBoxStartStop As System.Windows.Forms.GroupBox
-    Friend WithEvents ChBStartStop As System.Windows.Forms.CheckBox
-    Friend WithEvents LabelSSspeed As System.Windows.Forms.Label
-    Friend WithEvents TBSSspeed As System.Windows.Forms.TextBox
-    Friend WithEvents LabelSStime As System.Windows.Forms.Label
-    Friend WithEvents TBSStime As System.Windows.Forms.TextBox
     Friend WithEvents TextBoxEXS As System.Windows.Forms.TextBox
     Friend WithEvents TextBoxTRS As System.Windows.Forms.TextBox
     Friend WithEvents TbGBX As System.Windows.Forms.TextBox
@@ -1904,7 +1881,6 @@ Partial Class F_GEN
     Friend WithEvents TextBoxMAC As System.Windows.Forms.TextBox
     Friend WithEvents TextBoxMAA As System.Windows.Forms.TextBox
     Friend WithEvents TabPgKF As System.Windows.Forms.TabPage
-    Friend WithEvents TabPgStartStop As System.Windows.Forms.TabPage
     Friend WithEvents CbSOCnIter As System.Windows.Forms.CheckBox
     Friend WithEvents Label10 As System.Windows.Forms.Label
     Friend WithEvents TbSOCstart As System.Windows.Forms.TextBox
@@ -1970,4 +1946,10 @@ Partial Class F_GEN
     Friend WithEvents OpenWithGRAPHiToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
     Friend WithEvents OpenWithToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
     Friend WithEvents ShowInFolderToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
+    Friend WithEvents ChBStartStop As System.Windows.Forms.CheckBox
+    Friend WithEvents GrStartStop As System.Windows.Forms.GroupBox
+    Friend WithEvents TBSSspeed As System.Windows.Forms.TextBox
+    Friend WithEvents TBSStime As System.Windows.Forms.TextBox
+    Friend WithEvents LabelSStime As System.Windows.Forms.Label
+    Friend WithEvents LabelSSspeed As System.Windows.Forms.Label
 End Class
diff --git a/VECTO/GUI/F_GEN.vb b/VECTO/GUI/F_GEN.vb
index 580eaefb4260a96f5c3a34499366ee58e7a1a2d7..6b72e993e047c74537fe06a856bfaafb83f3d08c 100644
--- a/VECTO/GUI/F_GEN.vb
+++ b/VECTO/GUI/F_GEN.vb
@@ -9,7 +9,6 @@ Public Class F_GEN
     Private pgColdSt As TabPage
     Private pgHEV As TabPage
     Private pgMapCr As TabPage
-    Private pgStStop As TabPage
     Private pgTest As TabPage
     Private pgDriver As TabPage
 
@@ -37,7 +36,6 @@ Public Class F_GEN
         pgColdSt = Me.TabPgColdSt
         pgHEV = Me.TabPgHEV
         pgMapCr = Me.TabPgKF
-        pgStStop = Me.TabPgStartStop
         pgTest = Me.TabPgTEST
         pgDriver = Me.TabPgDriver
 
@@ -261,20 +259,6 @@ Public Class F_GEN
         End If
     End Sub
 
-    Private Sub SetStStoptab(ByVal OnOff As Boolean)
-        If OnOff Then
-            If Not pgStStopON Then
-                pgStStopON = True
-                Me.TabControl1.TabPages.Insert(1, pgStStop)
-            End If
-        Else
-            If pgStStopON Then
-                pgStStopON = False
-                Me.TabControl1.Controls.Remove(pgStStop)
-            End If
-        End If
-    End Sub
-
     Private Sub SetDrivertab(ByVal OnOff As Boolean)
         If OnOff Then
             If Not pgDriverON Then
@@ -972,16 +956,6 @@ Public Class F_GEN
         Call Change()
     End Sub
 
-    'Start/Stop - checkbox change
-    Private Sub ChBStartStop_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ChBStartStop.CheckedChanged
-        SetStStoptab(Me.ChBStartStop.Checked)
-        Change()
-    End Sub
-
-    'Start / Stop - Textbox change
-    Private Sub TBSSspeed_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TBSSspeed.TextChanged, TBSStime.TextChanged
-        Change()
-    End Sub
 
     'TextBox.TextChanged Events => Change()
     Private Sub TextBoxVEH_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBoxVEH.TextChanged
@@ -1090,7 +1064,13 @@ Public Class F_GEN
         Change()
     End Sub
 
+    Private Sub TBSSspeed_TextChanged(sender As System.Object, e As System.EventArgs) Handles TBSSspeed.TextChanged
+        Change()
+    End Sub
 
+    Private Sub TBSStime_TextChanged(sender As System.Object, e As System.EventArgs) Handles TBSStime.TextChanged
+        Change()
+    End Sub
 
 
 #End Region
@@ -1345,6 +1325,11 @@ lbDlog:
 
     End Sub
 
+    Private Sub ChBStartStop_CheckedChanged_1(sender As System.Object, e As System.EventArgs) Handles ChBStartStop.CheckedChanged
+        Change()
+        Me.GrStartStop.Enabled = Me.ChBStartStop.Checked
+    End Sub
+
 #Region "Open File Context Menu"
 
     Private CmFiles As String()
@@ -1384,4 +1369,7 @@ lbDlog:
 #End Region
 
     
+   
+
+ 
 End Class
diff --git a/VECTO/Input Files/cDRI.vb b/VECTO/Input Files/cDRI.vb
index 0b9a489d9a588c72212406c918c712e21ca24348..87f6f9889508af52a6558548a936e5e569477b80 100644
--- a/VECTO/Input Files/cDRI.vb	
+++ b/VECTO/Input Files/cDRI.vb	
@@ -858,6 +858,12 @@ lbEr:
         For i = 0 To tDim - 1
 
             vm = (Speed(i) + Speed(i + 1)) / 2
+
+            If vm = 0 Then
+                WorkerMsg(tMsgID.Err, "Speed can't be zero while distance changes! (line " & i.ToString & ")", MsgSrc)
+                Return False
+            End If
+
             ds = Dist(i + 1) - Dist(i)
             dt = ds / vm
 
diff --git a/VECTO/Input Files/cGEN.vb b/VECTO/Input Files/cGEN.vb
index 396d9a0298dbbbd2ad641602479d1487d1ef77f4..163649c19c66a2cecbb6e2d44199850931628d4a 100644
--- a/VECTO/Input Files/cGEN.vb	
+++ b/VECTO/Input Files/cGEN.vb	
@@ -276,12 +276,6 @@ Public Class cGEN
         'boEXSja = CBool(file.ReadLine(0))
         'stPathExs.Init(MyPath, file.ReadLine(0))
 
-        'If file.EndOfFile Then GoTo lbClose
-
-        'boStartStop = CBool(file.ReadLine(0))
-        'siStStV = CSng(file.ReadLine(0))
-        'siStStT = CSng(file.ReadLine(0))
-
         'boSOCnJa = CBool(file.ReadLine(0))
         'siSOCstart = CSng(file.ReadLine(0))
 
@@ -354,6 +348,12 @@ Public Class cGEN
             VehMode = tVehMode.StandardMode
         End If
 
+        If file.EndOfFile Then GoTo lbClose
+
+        boStartStop = CBool(file.ReadLine(0))
+        siStStV = CSng(file.ReadLine(0))
+        siStStT = CSng(file.ReadLine(0))
+
 lbClose:
 
         file.Close()
@@ -660,14 +660,6 @@ lbClose:
         'fGEN.WriteLine("c Exhaust System Simulation Configuration File")
         'fGEN.WriteLine(stPathExs.PathOrDummy)
 
-        'Start/Stop
-        'fGEN.WriteLine("c ICE Auto-Start/Stop (1/0) - Non HEV only")
-        'fGEN.WriteLine(Math.Abs(CInt(boStartStop)))
-        'fGEN.WriteLine("c Start/Stop Max Speed [km/h]")
-        'fGEN.WriteLine(siStStV)
-        'fGEN.WriteLine("c Start/Stop Min ICE-On Time [s]")
-        'fGEN.WriteLine(siStStT)
-
         'SOC-Start Iteration
         'fGEN.WriteLine("c SOC Start Iteration (1/0) - HEV only")
         'fGEN.WriteLine(Math.Abs(CInt(boSOCnJa)))
@@ -716,6 +708,14 @@ lbClose:
         fGEN.WriteLine("c Engine Only Mode (1/0)")
         fGEN.WriteLine(CStr(Math.Abs(CInt(EngOnly))))
 
+        'Start/Stop
+        fGEN.WriteLine("c ICE Auto-Start/Stop (1/0) - Non HEV only")
+        fGEN.WriteLine(Math.Abs(CInt(boStartStop)))
+        fGEN.WriteLine("c Start/Stop Max Speed [km/h]")
+        fGEN.WriteLine(siStStV)
+        fGEN.WriteLine("c Start/Stop Min ICE-On Time [s]")
+        fGEN.WriteLine(siStStT)
+
         fGEN.Close()
         fGEN = Nothing
 
diff --git a/VECTO/MODcalc/cPower.vb b/VECTO/MODcalc/cPower.vb
index 2424b94dc76cc85d81edc7e31a585ffbcb234b52..fa1204de0efcd8a23e91431294aa4926f7d7a4d7 100644
--- a/VECTO/MODcalc/cPower.vb
+++ b/VECTO/MODcalc/cPower.vb
@@ -439,6 +439,9 @@ lb10:
 
         Dim LastPmax As Single
 
+        Dim Vcoasting As Single
+
+
 
         Dim MsgSrc As String
 
@@ -821,7 +824,7 @@ lbCheck:
                 Else
 
                     If MODdata.nn(jz - 1) <= 0.00001 Then
-                        nn = 0
+                        nn = MODdata.nn(jz - 1)
                         GoTo lb_nOK
                     End If
 
@@ -928,7 +931,6 @@ lb_nOK:
                 End If
             Else
                 If Nvorg Then
-                    'Revolutions-setting
                     PaMot = (VEH.I_mot * MODdata.dnUvorg(jz) * 0.01096 * MODdata.nUvorg(jz)) * 0.001
                 Else
                     PaMot = ((VEH.I_mot * (VEH.AchsI * VEH.Igetr(Gear) / (0.5 * VEH.Dreifen)) ^ 2) * aist * Vist) * 0.001
@@ -1065,6 +1067,18 @@ lb_nOK:
                 Else    ' tEngState.Drag (tEngState.Idle, tEngState.Stopped kann's hier nicht geben weil Clutch <> Closed)
                     If P < Pmin Then
 
+                        'Overspeed
+                        If DEV.OverSpeedOn Then
+                            Vcoasting = fCoastingSpeed(jz, Gear, nU, Pmin)
+
+
+
+                        End If
+
+
+
+
+
                         MODdata.ModErrors.TrLossMapExtr = ""
 
                         'VKM to Drag-curve
@@ -1490,6 +1504,72 @@ lb_nOK:
     End Function
 
 
+
+
+    Private Function fCoastingSpeed(ByVal t As Integer, ByVal Gear As Integer, ByVal nU As Single, ByVal Pdrag As Single) As Single
+
+        Dim vstep As Double
+        Dim vVorz As Integer
+        Dim Pe As Single
+        Dim a As Single
+        Dim v As Single
+        Dim eps As Single
+        Dim PvD As Single
+        Dim LastDiff As Single
+        Dim Diff As Single
+
+        v = MODdata.Vh.V(t)
+
+        vstep = 0.1
+        eps = 0.001
+        a = MODdata.Vh.a(t)
+
+        'PlossGB = fPlossGBfwd(Pkup, v, Gear)
+        'Pe = fPvD(t, v, a) + PlossGB + fPlossDiffFwd(Pkup - PlossGB, Vist) + fPaG(v, a) + fPlossRt(v, Gear)
+
+        PvD = fPvD(t, v, a)
+        Pe = PvD + fPlossGB(PvD, v, Gear) + fPlossDiff(PvD, v) + fPaG(v, a) + fPlossRt(v, Gear) + fPaux(t, nU) + fPaMot(t, Gear)
+
+        Diff = Math.Abs(Pdrag - Pe) / VEH.Pnenn
+
+        If Diff > eps Then
+            vVorz = -1
+        ElseIf PvD < -eps Then
+            vVorz = 1
+        Else
+            Return v
+        End If
+
+        LastDiff = Math.Abs(Pdrag - Pe) / VEH.Pnenn
+
+        Do While Diff > eps And Math.Abs(LastDiff - Diff) > eps
+
+            If LastDiff < Diff Then
+                vVorz *= -1
+                vstep *= 0.5
+
+                If vstep = 0 Then Exit Do
+
+            End If
+
+            v += vVorz * vstep
+
+            a = 2 * (v - MODdata.Vh.V0(t)) / 1  'dt = 1[s]
+
+            LastDiff = Diff
+
+            PvD = fPvD(t, v, a)
+            Pe = PvD + fPlossGB(PvD, v, Gear) + fPlossDiff(PvD, v) + fPaG(v, a) + fPlossRt(v, Gear) + fPaux(t, nU) + fPaMot(t, Gear)
+
+            Diff = Math.Abs(Pdrag - Pe) / VEH.Pnenn
+
+        Loop
+
+        Return v
+
+    End Function
+
+
 #Region "Schaltmodelle"
 
     Private Function fStartGear(ByVal t As Integer) As Integer
@@ -1831,6 +1911,22 @@ lb_nOK:
 
         End If
 
+        '*** Error-Msg-Check ***
+        'Current rpm 
+        nU = fnU(Vist, Gear, Clutch = tEngClutch.Slipping)
+        nn = (nU - VEH.nLeerl) / (VEH.nNenn - VEH.nLeerl)
+        'Current power demand
+        Pe = Math.Min(fPeGearMod(Gear, t) * VEH.Pnenn, FLD.Pfull(nn))
+        Pe = Math.Max(Pe, FLD.Pdrag(nn))
+        'Current torque demand
+        Md = Pe * 1000 / (nU * 2 * Math.PI / 60)
+        'Clear old errors
+        MODdata.ModErrors.GSextrapol = ""
+        'Check for errors
+        GBX.fGSnnDown(Md)
+        GBX.fGSnnUp(Md)
+
+
         'If GearCorrection is OFF then return here
         If Not DEV.GearCorrection Then Return Gear
 
@@ -3315,6 +3411,14 @@ lb20:
         Return CSng(((VEH.Mass + VEH.MassExtra + VEH.m_raeder_red + VEH.Loading) * a * v) * 0.001)
     End Function
 
+    Private Function fPaMot(ByVal t As Integer, ByVal Gear As Integer) As Single
+        If Nvorg Then
+            Return (VEH.I_mot * MODdata.dnUvorg(t) * 0.01096 * MODdata.nUvorg(t)) * 0.001
+        Else
+            Return ((VEH.I_mot * (VEH.AchsI * VEH.Igetr(Gear) / (0.5 * VEH.Dreifen)) ^ 2) * aist * Vist) * 0.001
+        End If
+    End Function
+
     '----------------Slope resistance ----------------
     Private Function fPs(ByVal v As Single, ByVal t As Integer) As Single
         fPs = CSng(((VEH.Loading + VEH.Mass + VEH.MassExtra) * 9.81 * MODdata.Vh.Grad(t) * 0.01 * v) * 0.001)
diff --git a/VECTO/VECTO_Global.vb b/VECTO/VECTO_Global.vb
index 39712d7eddabec29167359f27e564a8ab6048e45..04da4e5a0fd498ee669ed6b4f2ce32758e8d6765 100644
--- a/VECTO/VECTO_Global.vb
+++ b/VECTO/VECTO_Global.vb
@@ -2,7 +2,7 @@
 
 Module VECTO_Global
 
-    Public Const VECTOvers As String = "1.1 beta 3"
+    Public Const VECTOvers As String = "1.1 beta 4"
     Public MyAppPath As String
     Public MyConfPath As String
     Public MyDeclPath As String
diff --git a/VECTO/cDEV.vb b/VECTO/cDEV.vb
index cdffccf3e4f156c89a7465dc02e6ef41d76c511e..8343fa0ff053226a08f0e55fe2663f985f1a3a57 100644
--- a/VECTO/cDEV.vb
+++ b/VECTO/cDEV.vb
@@ -13,6 +13,11 @@ Public Class cDEV
     Public TCnUstep As Single
     Public TCnUstepMin As Single
 
+    Public OverSpeedOn As Boolean
+    Public OverSpeed As Single
+    Public UnderSpeed As Single
+    Public EcoRollOn As Boolean
+
     '**************************************************************************************************************
     '**************************************************************************************************************
     '********************************* Instructions for integrating new DEV-Options *********************************
@@ -115,10 +120,14 @@ Public Class cDEV
         Conf0.BoolVal = False
         MyOptions.Add("TestOptions", Conf0)
 
+
+
         Conf0 = New cDEVoption(tDEVconfType.tBoolean, "Gear Correcion (gear shift polygons model only!)", False)
         Conf0.BoolVal = False
         MyOptions.Add("GearCorrection", Conf0)
 
+
+
         Conf0 = New cDEVoption(tDEVconfType.tSingleVal, "TC iteration: target precision for torque ratio")
         Conf0.SingleVal = 0.001
         MyOptions.Add("TCiterPrec", Conf0)
@@ -132,6 +141,23 @@ Public Class cDEV
         MyOptions.Add("TCnUstepMin", Conf0)
 
 
+        Conf0 = New cDEVoption(tDEVconfType.tBoolean, "OverSpeed", False)
+        Conf0.BoolVal = False
+        MyOptions.Add("OverSpeedOn", Conf0)
+
+        Conf0 = New cDEVoption(tDEVconfType.tBoolean, "EcoRoll", False)
+        Conf0.BoolVal = False
+        MyOptions.Add("EcoRollOn", Conf0)
+
+        Conf0 = New cDEVoption(tDEVconfType.tSingleVal, "OverSpeed [km/h]")
+        Conf0.SingleVal = 10
+        MyOptions.Add("OverSpeed", Conf0)
+
+        Conf0 = New cDEVoption(tDEVconfType.tSingleVal, "UnderSpeed [km/h]")
+        Conf0.SingleVal = 10
+        MyOptions.Add("UnderSpeed", Conf0)
+
+
         '**************************** END: Parameters Configuration '*****************************
         '*****************************************************************************************
         '*****************************************************************************************
@@ -146,6 +172,11 @@ Public Class cDEV
         TCiterPrec = MyOptions("TCiterPrec").SingleVal
         TCnUstep = MyOptions("TCnUstep").SingleVal
         TCnUstepMin = MyOptions("TCnUstepMin").SingleVal
+
+        OverSpeedOn = MyOptions("OverSpeedOn").BoolVal
+        OverSpeed = MyOptions("EcoRollOn").BoolVal
+        UnderSpeed = MyOptions("OverSpeed").SingleVal
+        EcoRollOn = MyOptions("UnderSpeed").SingleVal
     End Sub
 
     'Demo for Delegate Function
diff --git a/VECTO/cDelaunayMap.vb b/VECTO/cDelaunayMap.vb
index 68ef5b03070199f77913b7ae7f3929f3888c16bd..136c66a5b95ce7292b36821351ae4176cdbd9281 100644
--- a/VECTO/cDelaunayMap.vb
+++ b/VECTO/cDelaunayMap.vb
@@ -48,14 +48,14 @@ Public Class cDelaunayMap
 
 
 
-        '#If DEBUG Then
-        '        Debug.Print("x,y,z,x,y,z")
-        '        For Each tr In lDT
-        '            Debug.Print(tr.P1.X & "," & tr.P1.Y & "," & tr.P1.Z & "," & tr.P2.X & "," & tr.P2.Y & "," & tr.P2.Z)
-        '            Debug.Print(tr.P3.X & "," & tr.P3.Y & "," & tr.P3.Z & "," & tr.P2.X & "," & tr.P2.Y & "," & tr.P2.Z)
-        '            Debug.Print(tr.P1.X & "," & tr.P1.Y & "," & tr.P1.Z & "," & tr.P3.X & "," & tr.P3.Y & "," & tr.P3.Z)
-        '        Next
-        '#End If
+#If DEBUG Then
+        Debug.Print("x,y,z,x,y,z")
+        For Each tr In lDT
+            Debug.Print(tr.P1.X & "," & tr.P1.Y & "," & tr.P1.Z & "," & tr.P2.X & "," & tr.P2.Y & "," & tr.P2.Z)
+            Debug.Print(tr.P3.X & "," & tr.P3.Y & "," & tr.P3.Z & "," & tr.P2.X & "," & tr.P2.Y & "," & tr.P2.Z)
+            Debug.Print(tr.P1.X & "," & tr.P1.Y & "," & tr.P1.Z & "," & tr.P3.X & "," & tr.P3.Y & "," & tr.P3.Z)
+        Next
+#End If
 
 
 
@@ -100,8 +100,14 @@ Public Class cDelaunayMap
         Next
 
         'ERROR: Extrapolation
+
+#If DEBUG Then
+        Debug.Print(x & "," & y)
+#End If
+
         Throw New ArgumentException("Extrapolation not possible!")
 
+
         Return Nothing
 
     End Function
@@ -210,7 +216,7 @@ Public Class cDelaunayMap
         v = (dot00 * dot12 - dot01 * dot02) * invDenom
 
         ' Check if point is in triangle
-        Return (u >= 0) And (v >= 0) And (u + v < 1)
+        Return (u >= 0) And (v >= 0) And (u + v <= 1)
 
     End Function