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LVS fail

peter450

 I'm using bicmos8hp technology for a design. After completing DRC and running LVS I'm facing a problem

 *****  nvn fork terminated abnormally  *****



*WARNING* nvn exit with bad status
*WARNING* Status 256
*WARNING* Assura execution terminated.

I think the settings for LVS are not proper.  I used correct extractrules,binding rules, compare rules,rsf inclde files. 

 Can anyone help me ?

 

  • The current PDK is V1.2.0.0.  This was just released and only supports IC6.1 and Assura 4.1. 

    If using an older kit (e.g. V1.1.2.0), we know those files work so the likely issue us that you are using an old version of Assura (this kit also supports 4.1).  The error that you listed is kind of general and doesn't reveal the problem.  Is there any further detail, if you scroll up higher in the log file?  Regards, Zach

  •  I'm using Assura 4.1 and spectre 7.2. Some of the warnings I found in log file are

     WARNING Undefined layer in dfII.
        Layer name 'BI' doesn't exist, treating as an empty layer.
        bi = layer("BI" type("drawing"))

    WARNING LVS Run detected.
    Non-legacy mode has been disabled for this LVS run

    *WARNING* The terminals are not in parentheses. This is old syntax and will
             be interpreted as a device with fixed terminal number.
             The rule will be converted internally to new syntax:
             resDevice("kqres" ("D" "S" nil))

    Preprocessing schematic network phase 1
    *WARNING* genericDevice("subc_inh") - cell does not exist. This command will be ignored.
     WARNING (AVLVSNN-10050) : resDevice - cell 'oprrpres_inh' not found.
     WARNING (AVLVSNN-10050) : resDevice - cell 'oprrpres' not found.

    *WARNING* genericDevice("phaseinverter") - cell does not exist. This command will be ignored.

    WARNING (AVLVSNN-10034) : bindingFile/bind rule - schematic cell 'bondpad' is not found and
     will be considered a dummy cell. The default binding for layout cell 'bondpad(Generic)' will be broken.

    Finished /home/cadence/ASSURA/tools/assura/bin/nvn
    *WARNING* '?expandCellToParent' list: No cell name match for vpnpsx*
    *WARNING* '?expandCellToParent' list: No cell name match for corrPoint*
    *WARNING* '?expandCellToParent' list: No cell name match for esdnwsx*

    These are some of the warnings I'm getting.

  • I don't think any of these warnings are significant.  As I mentioned before, the old PDK (V1.1.2.0) ran LVS with no problems.  I just built a testcase with the new PDK (V1.2.0.0) and still LVS ran with no problems.   If your issue persists, you should contact the organization that supplied the PDK to you.  Be sure to indicate your version, although technically, only V1.2.0.0 is supported. Regards, Zach

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