diff --git a/CHANGES.md b/CHANGES.md
index 847548c163c93ff73c24a057d917ca5c0c3e005c..5e2f2d71961ca4ea28649994c23477757dc5a425 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,11 @@
 VECTO-AirDrag: Changes
 ===================
+#### 2018-02-08: v3.1.5 ####
+TUG improvements:
+
+  * New version number
+  * Hotfix for rounding method
+  
 #### 2018-01-22: v3.1.4 ####
 TUG improvements:
 
diff --git a/CSE/Calculation/main_calculation_call.vb b/CSE/Calculation/main_calculation_call.vb
index b63ed022fa89e7d4aa1d7c912f67f9ea3bec2562..c44f8d89bae972bbe8f43c6f877bfcdb01d08af3 100644
--- a/CSE/Calculation/main_calculation_call.vb
+++ b/CSE/Calculation/main_calculation_call.vb
@@ -170,7 +170,11 @@ Public Module main_calculation_call
             For i = 0 To ErgValuesReg(tCompErgReg.SecID).Count - 1
                 If ErgValuesReg(tCompErgReg.valid_RRC)(i) = 0 Then
                     Job.valid_RRC = False
-                    If Job.mode = 1 Then Throw New Exception("Invalid test - maximum deviation of RRCs between low speed tests exceeded")
+                    If Job.mode = 1 Then
+                        Throw New Exception("Invalid test - maximum deviation of RRCs between low speed tests exceeded")
+                    Else
+                        logme(8, False, format("Invalid test - maximum deviation of RRCs between low speed tests exceeded"))
+                    End If
                 End If
             Next i
 
@@ -182,7 +186,7 @@ Public Module main_calculation_call
             logme(7, False, "Results from the calculation")
             logme(6, False, "average absolute beta HS test: " & Math.Round(Job.beta, 4, MidpointRounding.AwayFromZero))
             logme(6, False, "delta CdxA correction: " & Math.Round(Job.delta_CdxA_beta, 4, MidpointRounding.AwayFromZero))
-            logme(6, False, "CdxA(0): " & Math.Round(Job.CdxA0, 4, MidpointRounding.AwayFromZero))
+            logme(6, False, "CdxA(0): " & Math.Round(Job.CdxA0, 2, MidpointRounding.AwayFromZero))
 
             ' Clear the dictionaries
             ErgValuesComp = Nothing
diff --git a/CSE/GUI/F_VECTOInput.vb b/CSE/GUI/F_VECTOInput.vb
index a29fb1883448e8aca1e71d087a5e9557fc52e132..864449aa8021b49d097640d3f81ee47ccfe57398 100644
--- a/CSE/GUI/F_VECTOInput.vb
+++ b/CSE/GUI/F_VECTOInput.vb
@@ -14,7 +14,7 @@ Public Class F_VECTOInput
         Dim configL As Boolean = True
 
         ' Disable the CdxA box
-        TBCdxA.Text = Math.Round(Job.CdxA0, 4, MidpointRounding.AwayFromZero)
+        TBCdxA.Text = Job.CdxA0
         TBCdxA.Enabled = False
 
         ' Load the config file
diff --git a/CSE/My Project/AssemblyInfo.vb b/CSE/My Project/AssemblyInfo.vb
index 0b3b85c1ecc71d933f7883ca642e549beeae86b3..ad11ae9d6dbaf22604377346d1f70185f3a02a13 100644
--- a/CSE/My Project/AssemblyInfo.vb	
+++ b/CSE/My Project/AssemblyInfo.vb	
@@ -31,5 +31,5 @@ Imports System.Runtime.InteropServices
 ' übernehmen, indem Sie "*" eingeben:
 ' <Assembly: AssemblyVersion("1.0.*")> 
 
-<Assembly: AssemblyVersion("3.1.4.0")>
-<Assembly: AssemblyFileVersion("3.1.4.0")>
+<Assembly: AssemblyVersion("3.1.5.0")>
+<Assembly: AssemblyFileVersion("3.1.5.0")>
diff --git a/Docs/VECTO-Air Drag_ReleaseNotes_3.1.4.pdf b/Docs/VECTO-Air Drag_ReleaseNotes_3.1.5.pdf
similarity index 79%
rename from Docs/VECTO-Air Drag_ReleaseNotes_3.1.4.pdf
rename to Docs/VECTO-Air Drag_ReleaseNotes_3.1.5.pdf
index e47d4ddf9ab676f4d8cbf8192d8414785983e05b..f8c5ae7ca53bf9b90a2a121f45269b03677f39da 100644
Binary files a/Docs/VECTO-Air Drag_ReleaseNotes_3.1.4.pdf and b/Docs/VECTO-Air Drag_ReleaseNotes_3.1.5.pdf differ