Hello sir, I have questions regarding RING for which I have been getting such an error below since morning: @@@@@@@ @ @@@@ @ @@ @@ @@@ @@ @@ @@ @@ @ @@ @ @@ @@ @@@ @@@ @@ @@ @@ @@@@ @@@ @ @@ @@@@@ @@ @@ @@ @@ @@@@@ @@ @@ @@ @@ @@ @@ @ @@ @@ @@ @@ @@ @@ @@ @ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @@@@@ @@@ @@@@@@ @@@@ @@@@ @@@@ 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. o computing the best placement of the pads. The pads <vdd> and/or <vss> aren't place in front of the side 'S' of the core. You may place again the supply pads, in order to center them in front of the core. Please I'll appreciate an explanation of the two statements above. For ex: what location is meant by "the front side 'S' of the core" (I suppose S stands for south). Does the statement mean that vdd and/or vss should be placed in the North side or still on the south side. Also which locations constitute the core's front/back? What I have been doing was moving Vdd and Vss all around(N,S,E,W) (noting the info in MAN RING), hoping the errors would disappear, however I continued getting errors: with the statement above changing from S to N, then to W and then to E. This is my (.rin) file: width (vdd 100 vss 100) west ( p0 p19 p20 p1 ) north ( p2 p16 p18 p3 ) east ( p14 p12 ) south ( p13 NCpad ) where p16, p18, p19 and p20 are my power pins (pvsse_sp, pvdde_sp, pvssi_sp, pvddi_sp). Pls can you tell me whats wrong with the arrangement. I've tried relocating everything over and over, but I still get the same " The pads <vdd> and/or <vss> aren't place in front of the side (S/N/E/W) of the core." error. Pls could you help me out. Thanks Giie --------------------------------- Do You Yahoo!? Send your FREE holiday greetings online at Yahoo! Greetings.