When recompiling an application I received an error message "memo file 'project name.pjt' is missing or invalid". It is not missing so I assume it is invalid.

Can any one tell me: (a) what causes this, and (b) what can be done about it?

Just prior to this I had spent some time relinking the project with a large number of its classes, progs, ... (Why that happened I have no idea at all.)
That seems to be OK now but I am unable to complete a compilation.

Any help will be appreciated

Godfrey