TForm Resource not found

Question

I had to format my computer and reinstall RAD Studio 10.4.

I have many projects. All projects have been recompiled and are running, except for one project that is showing strange behavior.

Any new form I add to the project, when I create the Form, I get the message:

Project XXX raised exception class EResNotFound with the message 'Resource TFormYYY not found'

Also, if I add a new TMenuItem to TMainMenu, the new item does not appear.

It happens only in this particular project.

I tried a few things:

• Deleted the project .res, .dproj, and .dproj.local files.

• Compared the project options with the options of other projects, which is OK.

• Restored a backup copy.

I suppose this is a resource issue, but I could not find a solution.

Update: if I change the project name everything works fine!