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AMS-UltraSim: error passing commands to Ultrasim

PNadeau

Dear Cadence experts,

I'm encountering a problem in trying to pass some commands to Ultrasim from ADE L using the AMS simulator mode.  For example, I want a node connectivity report from Ultrasim, so I go to Simulation->Options->Analog(Ultrasim)->Checks->Node Connectivity Analysis and check the box (and fill the options).

The following line is generated in amsControlUltraSim.scs:

// UltraSim Node Connectivity Analysis options
usim_report node elem_threshold=10

But I receive the following error (note the usim_report above is line 27 of amsControlUltrasim.scs)

irun: *E,SPCERR: The program encountered one or more errors while processing the input SPICE file(s) in the AMSD flow. For details, see the following messages.
amsspice: *    ERROR (SFE-874): "amsControlUltraSim.scs" 27: Unexpected identifier "elem_threshold". Expected equals.
amsspice: *Error: terminated with error code 2

There are other commands in the file that are processed just fine, such as a bunch of usim_opt and usim_vr commands. 

Something I noticed is that all of the commands that work have the format

usim_command something=value

Whereas some of the commands I want to use, such as the usim_report node, and usim_report partition, do not have the = sign format.

To the untrained eye, it seems like the amsspice parser is expecting every ultrasim command to have the equals format.

Is there another way I can ask for a partition and node-connectivity report.  Is there a workaround for this?

Appreciate your help,

Phil

  • I'd expect that to work. Which version of the INCISIVE tools are you using (what does it say as a subversion in the irun log)?

    Regards,

    Andrew.

  • Hi Andrew,

    Thanks for the quick response.

    Here is the header of my irun log:

    irun: 14.10-p001: (c) Copyright 1995-2014 Cadence Design Systems, Inc.
    TOOL:    irun    14.10-p001: Started on Apr 15, 2015 at 15:08:14 EDT

    Also, I am using IC 6.1.6.101 on RHEL 6. 

    If this in indeed a bug, I wonder if you might know an alternate way I can specify these Ultrasim options for now while still using the ADE L environment?  Could I specify irun command line options in the Simualtion->Options->AMS form that could still be passed to Ultrasim somehow?  Maybe specify a file from the command line? I couldn't quite figure this out...

    Thanks in advance,

    Phil

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