Solved!It had something to do with having an installed version and testing a program using a partly changed local version (renames of files too) and partly the installed version. This caused the same type from several sources and thereby making them differ. Removing the installed versions cleared every error.
That leaves us with the error message not completely comprehensible by people like me. Raku does see a difference but doesn't say which.
Anyways, thanks for answering Marcel
