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 Error while importing .gds in cadence IC 6.16 

Last post Tue, Jun 10 2014 8:00 AM by Andrew Beckett. 4 replies.
Started by radiowaves 07 Jun 2014 09:48 PM. Topic has 4 replies and 1749 views
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  • Sat, Jun 7 2014 9:48 PM

    Error while importing .gds in cadence IC 6.16 Reply

    Hi,
    I get the follwing error while importing a .gds file in cadence IC 6.16

    ERROR (XSTRM-80046): You are trying to modify the tech database, but the tech database is not writable. Check the tech database file and parent directory permissions.

    What is tech database? How to fix this?

    • Post Points: 5
  • Mon, Jun 9 2014 4:47 PM

    Re: Error while importing .gds in cadence IC 6.16 Reply

     Hi experts,

    It seems that  if I do not attach to a technology library while importing I do not get this error. Is it OK if I import a .gds without attaching it to a techlib?

    • Post Points: 20
  • Tue, Jun 10 2014 6:58 AM

    Re: Error while importing .gds in cadence IC 6.16 Reply

    You could, but it's probably not a good idea.

    You could either go to the Geometry tab on the stream in form and turn off "Skip Undefined LPPs", or you could create a library which references your technology library (rather than attaches to it), and then any undefined layer purpose pairs will be added to the library's own incremental technology database. In other words, the previously known layer purpose pairs will be in the main technology library, but any extra undefine LPPs will be added to your local library's incremental tech db (which tops up the main tech library).

    Andrew.

    • Post Points: 20
  • Tue, Jun 10 2014 7:57 AM

    Re: Error while importing .gds in cadence IC 6.16 Reply

     Hi Andrew,

    Thank you very much. So, I followed these steps:

    1. Created a library and referenced to technology library.

    2. Imported a .gds to this library by filling Xstream In form as follows.

       Stream file: .gds

      Top level cell: Blank

      Attach Technology Library: Blank

      Load ASCII Tech File: Blank

      I hope this is OK.

    • Post Points: 20
  • Tue, Jun 10 2014 8:00 AM

    Re: Error while importing .gds in cadence IC 6.16 Reply

     Should be. I think the log file will tell you about any undefined layer purpose pairs that got created.

    Andrew.

    • Post Points: 5
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Started by radiowaves at 07 Jun 2014 09:48 PM. Topic has 4 replies.