--- a/Win32FileDialog.st	Fri Apr 01 12:47:05 2016 +0200
+++ b/Win32FileDialog.st	Fri Apr 01 12:49:46 2016 +0200
@@ -719,7 +719,9 @@
         ] ifFalse:[
             fileName := nil.
             error := OperatingSystem commDlgExtendedError.
-            self error:('GetOpenFile failed with error: %1' bindWith:error).
+            error ~~ 0 ifTrue:[
+                self error:('GetOpenFile failed with error: %1' bindWith:error).
+            ].
         ].
     ] ensure:[
         openFileNameStructExternalBytes notNil ifTrue:[openFileNameStructExternalBytes free].