I was following the example about the design of the fulladder recently post in the alliance web and when I reached the point for generating the layout of the fulladder with the scr tool I noticed that the scr gets hang up when including the option -l 2. I have the alliance package intalled on a SunOs environment and so at the begining I thought it was a problem of memory so I executed the command in another machine with 2 Gb Ram and I got the same result. The execution never ends. What can happen ?? A screenshot of the result is as follows : huertarn@rapra15> scr -p -r -l 2 -i 1000 fulladder @@@@ @ @@@@ @ @@@@@@@ @ @@ @@ @@ @@ @@ @@ @ @@ @ @@ @@ @@@ @@ @ @@ @@ @@@@ @@ @@ @@ @@@@ @@ @@@@@ @@@ @@ @@ @@ @ @@ @@ @@ @@ @@ @@ @@ @ @@ @@ @@@ @ @@ @@ @@ @@ @ @@@@ @@@@ @@@@@ @@@ Standard Cell router Alliance CAD System 4.0.6, scr 5.3 Copyright (c) 1991-2000, ASIM/LIP6/UPMC E-mail support: alliance-support@asim.lip6.fr Loading logical view : fulladder *** mbk warning *** lofigchain is missing on lofig fulladder. Placing logical view : fulladder Loading SCP data base ... Original width : 162 Generating initial placement ... 9 cells 14 nets in 2 rows Placement in process of treatment : 100% 47% saved in 3.3 s Saving placement 100% Checking consistency between logical and physical views Loading SCR data base ... Deleting MBK data base ... When reaching this point it never ends so I have to abort the process. Thanks in advance, Ramon