I am almost certain that my Quartus II web 13.1 program creates RTL schematics with errors in them. (I have not upgraded the installation afterwards because my computer is offline!).

Hi KhaiY, I tried to login on the Intel page to answer but the URL somehow was rejected. See attached screencopy. Therefore I answer you by using my mail for replying. (I used my Opera browser when that error page generated). I tested my supposed 'corrupted' attachment file and was completely able to open and extract all single files. So I think it is the by the Quartus II program generated files that make them unusable? Because as said I got an error warning that said the program couldn't completely generate the files because the BRAM16x1S/16x2 VHDL file wasn't entirely successfully compiled. (Note that Xilinx ISE 14.6 had no problem with this same VHDL file!). I can resend you the files again but I think that it will make no difference when Quartus fails to completely compile again? Thanks. Albert.