heheh thanks Alaxandra for the kind reply, but now I seem unable to open the log generated, I got out-ex2.nam tried to open it with Tgraph but got: Trouble reading number from file (row 1, field 1) ==> V -t * -v 1.0a5 -a 0\n ERROR: Cannot load the graph! When opening the nam file, any ideas how do I convert a file to tgr? thanks a lot.