I'm not following the topic, but please check that old wxs files still work and produce correct code!
Today, I found one issue about my changes in rev11510.
I have a wxImagePanel control in wxSmith which is created by C::B 17.12.
The Image field is "<none>".
When I load this wxs file, the latest C::B will complain that there is not file named "<none>", and a MessageBox will shown.
I think I need to handle this special case for the migration.
EDIT:
+    wxBitmap ImagePanel2_bmp = wxBitmap(wxImage(("")));
+    ImagePanel2->SetBitmap(ImagePanel2_bmp);
+    wxBitmap ImagePanel1_bmp = wxBitmap(wxImage(("<none>")));
+    ImagePanel1->SetBitmap(ImagePanel1_bmp);
So, it should not create the above two code snippet if the Image field is empty or "<none>"