From 592c0e3517e24dd61f0b91f31f6ca3fc5e5c9bd3 Mon Sep 17 00:00:00 2001
From: Markus Quaritsch <markus.quaritsch@tugraz.at>
Date: Mon, 25 Sep 2017 09:08:52 +0200
Subject: [PATCH] check if a wheel dimension is selected

---
 VECTO/GUI/VehicleAxleDialog.vb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/VECTO/GUI/VehicleAxleDialog.vb b/VECTO/GUI/VehicleAxleDialog.vb
index ed98450046..c9afe4f110 100644
--- a/VECTO/GUI/VehicleAxleDialog.vb
+++ b/VECTO/GUI/VehicleAxleDialog.vb
@@ -64,7 +64,7 @@ Public Class VehicleAxleDialog
 				.RollResistanceCoefficient = TbRRC.Text.ToDouble(0),
 				.TyreTestLoad = TbFzISO.Text.ToDouble(0).SI(Of Newton)(),
 				.TwinTyres = CbTwinT.Checked,
-				.WheelsDimension = CbWheels.SelectedItem.ToString(),
+				.WheelsDimension = If(IsNothing(CbWheels.SelectedItem), "", CbWheels.SelectedItem.ToString()),
 				.Inertia = TbI_wheels.Text.ToDouble(0).SI(Of KilogramSquareMeter)()
 				}
 
-- 
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