>After converting a DOS 2.6 screen to VFP6 I receive an error when trying to
>open the VFP6 screen through the project. The error message is "error loading
>file - record number 53. cmgDummy1 <or one of its members>.ColorSource:Expression
>evaluated to an illegal value. This error seems in reference to an invisible
>button created using the screen generator in 2.6. I am unable to open the
>screen in VFP6 to change the value. Does anybody have a solution?

http://support.microsoft.com/support/kb/articles/q195/5/14.asp