>What I tried was including the main EXE in my project in the Applications section. I also removed the old reference in the Classes tab which included FournierTransformationListe. In my sub EXE, I have the line to include the classlib in my main PRG. I renamed the classlib to a temporary name in order to avoid having it added back to the project. However, when I compile, I have the error stating that the classlib is not found.

Maybe there's direct reference to that classlib somewhere else in your code?