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Are you running them at the same time? If so, it's likely that the runSimulation script is being updated from one session before another session invokes it - and that would confuse the communication channels.
In reply to Andrew Beckett:
Andrew BeckettAre you running them at the same time? If so, it's likely that the runSimulation script is being updated from one session before another session invokes it - and that would confuse the communication channels.Regards,Andrew.
In reply to wonyoung Kim:
When you run "-nograph" it launches an X server behind the scenes which doesn't display anything. In IC5141 and releases up to and including IC613 it starts a program called "Xndx". From IC614 forwards, it actually runs a vnc server.
It has to do this (or rather it's much simpler to do this) because then all the UI functions still work - you don't have to code in lots of places for whether the display is there or not.
Sometimes if you get these X errors you can just run "Xndx" before you start ".. -nograph" (or if using IC614, use "cdsVncserver :80" before you run with -nograph). This will pre-start the X server which swallows the X traffic - and that can improve matters. That said, I've not had to do this for some time.
It's probably advisable to create a service request via http://support.cadence.com to discuss this with an application engineer.