> What a bold claim... Looks like he has something wrong wiht his video cards drivers > instead... HLSL with MAMEUI runs like a charm here. Have a nice day.
It's not a claim. The same error happened to me even using official MAME command line binary before all the HLSL fixes got submitted (running u5 and u6 before the u7 fixes) using nvidia GTX 480 and latest drivers at that time.
That error has nothing to do with driver issues or bad hardware. Whenever HLSL fowls up or something affects it, it generates that kind of error or one similar.