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conversion off grid

flintae32
Hi Cadence Community

I am having a bit of a problem transitioning existing layout designs from Cadence’s Virtuoso 5.10.4 to Virtuoso 6.1.4. Using the Conversion Tool Box feature CDB to OpenAccess Translator that is provided. The design transition over to 6.1.4 is relatively smooth, lvs checks are clean.  However, in running the Design Rule Check the following error message is trigger when running top level hierarchy cellview check which includes the seal ring and bondpads. All sub-cells DRC checks are clean.

[2044] offGridShapeErrors:  GRCE001: CHIPEDEG x and y dimensions must be an even number of grid points

I hope there is a fix or a work around for this challenge.

Any help or insight will be greatly appreciated

Johnny

  •  Hi Johnny,

     this sounds like a valid error coming from your DRC rule deck. Check the x/y dimensions of the CHIPEDEG  ( CHIPEDGE ?)  shape and divide it by your minimum drawing grid ( depends on the technology). Do you get an even or uneven number? 

    If you not get the same error on the old 5.1.41 database, check the  shape dimensions there. Any differences?

    Is it the same DRC rundeck between 5.1.41 and 6.1.4 ?  Maybe the 6.1.4 DRC rundeck is more advanced and has some additional checks.  

     

    I can't see a tool problem here.

     

    Kind regards,

    Marc

     

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