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warning when create library

Duy Hien

Hi everyone, 

I would like to ask about a warning in CIW. When I try to create a library which "Attach to an existting techfile" option, the CIW displays warning:

http://www.cadence.com/CSSharedFiles/forums/storage/38/1310402/qrc.inverter_test.log.txt

*WARNING* (TECH-230035): User-defined rule "minExtensionDistance" in constraint
                         group "foundry" of techDB "<tech_name>" conflicts with
                         a built-in constraint with the same name.
                         You may write out "constraintGroups" section to an
                         ASCII file, reopen the technology database in "a"
                         mode, and reload the file to update the database.
                         Another option is to rename this rule.

Can anyone figure out this problem, please?

Thank you so much.

Regards.

 

Parents
  • Andrew Beckett

    From doing a bit of digging, I believe this is due to a change that was made in IC614 (not sure precisely which subversion) where the constraint groups used were mapped to the correct OpenAccess constraint group names. It affects technology databases that were compiled before this. I think it may have been that the technology database was compiled in IC613, and that's the problem.

    I think doing a "Save" of the technology file from the technology library in Tools->Technology File and then doing a "Load" in Replace mode back to the same technology library would fix it. But you might want to check with the foundry first in case they have a newer version of the PDK. That's effectively what the instructions in the message are telling you to do.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    From doing a bit of digging, I believe this is due to a change that was made in IC614 (not sure precisely which subversion) where the constraint groups used were mapped to the correct OpenAccess constraint group names. It affects technology databases that were compiled before this. I think it may have been that the technology database was compiled in IC613, and that's the problem.

    I think doing a "Save" of the technology file from the technology library in Tools->Technology File and then doing a "Load" in Replace mode back to the same technology library would fix it. But you might want to check with the foundry first in case they have a newer version of the PDK. That's effectively what the instructions in the message are telling you to do.

    Regards,

    Andrew.

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