DSP builder IP generator error

Found the problem. The problem was due to Quartus not finding the correct the ".ipx" file, which points to the FFT MegaCore generated files (the "...Import" folder). This is weird because the path was defined in the project properties, but for some reason Quartus needs another ".ipx" file, which points to the needed ".ipx", before he uses it.

Anyway, in case someone from Altera reads this, the error message Quartus outputs

(Error: IP Generator Error: Entity '' (Version latest) not found in librarian.)

is very misleading. I suggest chagning it to a more inofrmative one

Gilad