不太清楚具体问题。可以给一下input cards 吗?
不过,看一下METHOD statement 的Newton 有一段(Chap 19):另第18章8节有有论述算法的内容。gumel DVMAX sets the maximum allowed potential update per Newton iteration. Large voltage steps are often required when simulating high voltage devices. If any simulation requires voltage steps of 10V or more, set DVMAX to 100,000. Reducing DVMAX may serve to damp oscillations in solutions in some cases leading to more robust behavior. However excessive reduction in DVMAX is not recommended since the maximum voltage step allowed will be limited by DVMAX*ITLIMIT. The alias for this parameter is N.DVLIM.