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--- begin_end_sequence [2018/03/21 04:50] – created wolfgangriedmann
+++ begin_end_sequence [2018/03/30 12:22] – wolfgangriedmann
@@ Line 6: / Line 6: @@
 The biggest difference between the error handling in .NET and Visual Objects stays in the ErrorBlock() handling. Please see the relative topic: [[vo_errorblock|The VO ErrorBlock]]
+Unfortunately, in the ''begin sequence'' - ''end sequence'' construct seems to be a major compatibility issue. This code for example:
+<code>local uVal1 as usual
+local uVal2 as usual
+local uVal3 as usual
+begin sequence
+  uVal1 := "Hi"
+  uVal2 := 2
+  uVal3 := uVal1 + uVal2
+end sequence</code>
+when executed in VO shows a runtime error, as expected.
+When you execute it in X#, it does not shows any runtime error.
+This could lead to not see runtime errors in your migrated VO application.
+Until the X# development team is able to add some enhancements in their own runtime, you should better use the .NET ''try - catch'' statements, and if you need to remain source compatible between VO and X#, you can use code like this:
+<code>#ifdef __XSHARP__
+  try
+#else
+  begin sequence
+#endif
+uVal1 := "Hi"
+uVal2 := 2
+uVal3 := uVal1 + uVal2
+#ifdef __XSHARP__
+  catch oEx as Exception
+  ErrorBox{ nil, oEx:Message }:Show()
+  end try
+#else
+  end sequence
+#endif</code>