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Transient simulation taking too much memory

vshssvs7

Sir,

I have to run a transient simulation of a transistor-level Charge Pump PLL. I have noticed that it is taking too much memory. icfb got shutdown by itself with this message at the terminal:

ERROR: Unable to allocate memory for transition file slice variable transition index level (read).

The simulation was not complete and it shutdown in between. The size of tran.tran.trn is around 40 GB.

Note that I have already done this: In Analog Design Environment, Outputs -> Save All, I have checked "selected" option in "select signals to output (save)" and Outputs -> to be saved -> select on schematic and selected few nets that I wanted to save

But even after doing the above, it is still saving every net (because I'm able to plot those nets) which is the reason for such a huge tran.tran.trn file. What more should I do to stop it from saving every net? (and only save the nets that I select) 

 

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  • Did you uncheck the "device currents" on the save all form (you had it set to nonlinear on the excerpt you sent).

    On the case with the real problem, can you maybe post the bottom part of the input.scs (from the simulationOptions line to the end of the file)?

    Regards,

    Andrew.

Reply

  • Did you uncheck the "device currents" on the save all form (you had it set to nonlinear on the excerpt you sent).

    On the case with the real problem, can you maybe post the bottom part of the input.scs (from the simulationOptions line to the end of the file)?

    Regards,

    Andrew.

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