Hello, #1. Still regarding my last couple of emails on errors when using RING, Yes I still get the same errors. Heres the latest : adder circuit $ ring addchip addchip @@@@@@@ @ @@@@ @ @@ @@ @@@ @@ @@ @@ @@ @ @@ @ @@ @@ @@@ @@@ @@ @@ @@ @@@@ @@@ @ @@ @@@@@ @@ @@ @@ @@ @@@@@ @@ @@ @@ @@ @@ @@ @ @@ @@ @@ @@ @@ @@ @@ @ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@@@@ @@@ @@@@@@ @@@@ @@@@ @@@@ PAD ring router Alliance CAD System 4.5.0, ring 2.11 Copyright (c) 1991-2001, ASIM/LIP6/UPMC E-mail support: alliance-support@asim.lip6.fr o reading netlists, layout views of core and pads. o reading file of parameters, including the placements of pads. o making equipotential list. o making the first placement of pads. o filling data internal structures. o reading the connectors positions of the core. "Distance between connector <y 2> and connector <b 3> of the core isn't big enough." What does the statement in quote indicate? I mean where is the error exactly - is it in the (.rin / .vst / .c) file for the chip or in the core generated (.vst) file. I'm asking so that I'll know where to focus attention. #2. In one of the replies(to my emails) I read , I was told to move the connectors. Pls how do I move the connectors. What I did was to change the positions of the concerned indicators in the (.rin) file but I still get the same error above. Is that what is meant by moving connectors? I mean changing their positions in the RIN file? #3.It was also said that the RING tool has a lot of bugs. Is it ok then to use SCR instead of RING..... I was thinking - since scr for for standard cells etc., and ring is for pads, it wouldnt produce the same result, but maybe i'm wrong. Could SCR be used instead of RING to produce the same (.ap) file? PLS COULD YOU CC ME IN YOUR REPLY. Thanks Giie --------------------------------- Do You Yahoo!? Check out Yahoo! Shopping and Yahoo! Auctionsfor all of your holiday gifts!