I'm trying to perform a very simple (or so I thought) HSPICE simulation with a 36-port S- element for 18 coupled package lines. Only one port is driven with a pulse, the rest are terminated with RC loads. The simulation fails with the dreaded "internal time step too small in transient analysis" error message. I don't use any fancy options in my S-element model line. Just: .model s-para-line18 s tstonefile='../s-parameter/line18.s36p' Could any one share tricks for better transient convergence with large S-elements? Thanks. Hassan. ------------------------------------------------------------------ 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: http://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: http://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