diff --git a/CobXmlSupport/ShowCode.cs b/CobXmlSupport/ShowCode.cs
index 5f5c549..0ec0ba0 100644
--- a/CobXmlSupport/ShowCode.cs
+++ b/CobXmlSupport/ShowCode.cs
@@ -338,6 +338,7 @@ namespace CobXmlSupport
             saveWin.FileData = this.txtCode.Text;
             saveWin.ShowDialog();
             finalFileSafe = saveWin.finalFileName;
+            btnCompare.Enabled = (finalFileSafe.Trim() != "");
         }
 
         private void ShowCode_Load(object sender, EventArgs e)
@@ -347,12 +348,20 @@ namespace CobXmlSupport
                 btnSaveAktualText.Enabled = false;
             }
             else btnSaveAktualText.Enabled = true;
+            btnCompare.Enabled = false;
         }
 
         private void btnCompare_Click(object sender, EventArgs e)
         {
-            string  existing = finalFileSafe.Substring(finalFileSafe.LastIndexOf("\\"));
-            Process.Start("C:\\Program Files (x86)\\WinMerge\\WinMergeU.exe",finalFileSafe +" Q:\\kII20\\cpy\\"+existing);
+            try
+            {
+                string existing = finalFileSafe.Substring(finalFileSafe.LastIndexOf("\\"));
+                Process.Start("C:\\Program Files (x86)\\WinMerge\\WinMergeU.exe", finalFileSafe + " Q:\\kII20\\cpy\\" + existing);
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show("Problem vid starta WinMerge :" + ex.Message);
+            }
         }
 
     }