Hi, it's me again... First at all, thank L.J. for you help last time... I'm continuing working with fpgen, and I need somebody helps me: I have now a new problem: In the file attached are two gif images: dlatch.gif = D latch sstack.gif = micro stack which uses the dlatch Please execute the following lines: > make dlatch_fpgen.vst ------> creates the vst file from dlatch_fpgen.c > make sstack_fpgen.vst ------> creates the vst file from sstack_fpgen.c > make sstack_genpat.pat ------> creates the pattern file sstack_genpat.pat using the file sstack_genpat.c > make sstack_pat ------> executes "asimut sstack_fpgen sstack_genpat sstack_simu" the last line generates the error: asimut is bloqued!!! I think the problem is the latch... The question is: Can I create memory circuits with fpgen??? The latch works fine ( try > make dlatch_genpat.pat; > make dlatch_pat; and look the file dlatch_simu.pat ). I thank you for your attention, regards: Rafael Becerra P.D. This module is part of a 16 bits RISC microprocessor (our thesis). When the circuit and the documentation will be finished we want share this work with everybody, we think it could have some worth. Thanks again.