This is for my school project. I am pretty new at this. According to my book when i type this script below it should work, however i get the error below... do_while(test!='a'); { ch=1; ch=PA_DR; } ZLD-E0004 Error: Symbol '_do_while' is undefined -- To unsubscribe from cores mailing list please visit http://www.opencores.org/mailinglists.shtml