Quartus Prime Pro 19.2 quits unexpected with following error report. Does anybody know, what's the problem in this case?

Thank you for your support.

Yes, in recent projects we use vhdl, but there are some bdf-relicts, where it is still possible to use them in current designs.

And as mentioned earlier, I liked to use the block-view for the top-level-entity to have a good overview and find the corresponding higher-level-code easier.