>Hello, VFP experts!
>
>I got this error message when I tried to run the .EXE file I built. "Class name is invalid." There was no error during or after
> compilation. I have included the classes I am using in the same folder and also set them as default in the
> "Tools/Options/Controls".
>
>I use the same method in other projects and they worked well. Does this mean that I have accidentally use a class that is
> not in the same folder? or maybe some other reason.
>
>Kindly help me. Thank you in advance.
>
>Maybelle

This may mean that some form became corrupted or a library became corrupted. Try compiling each form from the project and each library from the project.