Dear helpdesk, I've just downloaded and installed Alliance 3.0 from ftp.ibp.fr. But when I followed the tutorial steps in ADDACCU. I experienced an error that didn't tell in the tutorial. That is: Topic 6.2 Simulation of the specification netlist. setenv MBK_IN_LO vst setenv MBK_OUT_LO vst asimut addaccu addaccu schema ... error 109: signal 'cki' never assigned Thanks a lot for your developing the software and answering my question. regards, Chakkapas Visavakul