Hi Kami, If you have HSPICE version 2005.09 or newer, you can set .option ALTCC in your netlist. This option enables HSPICE to only read the input netlist once for multiple .ALTER statements. This option is designed to be used in the process of standard cell library characterization when an .ALTER statement just changes parameters, source stimulus, analysis, or passive elements.=20 Tracy Barclay Synopsys -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Kamran Azizi Sent: Wednesday, June 28, 2006 09:12 To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] spice question Is there any feature in Hspice not to go through the error check, etc. when it is running the simulations agian through .alter statement? I believe the .alter statments should not take the same time as the original one? any help? =20 Kami <snip> ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu