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Can't open cells in hierarchical schematic in Virtuoso

oAwad

Hello all,

I have a design in Cadence Virtuoso (originally designed in SoC Encounter using NangateOpenCellLibrary 45nm std cells), when I try to open any std cell in the design schematic, I get these warnings and the std cell schematic open having all pins (inputs and outputs) marked as "unbound"

*WARNING* (DB-270337): Failed to open cellView (ipin symbol) from lib (NangateOpenCellLibrary) in 'r' mode because cellview does not exist.
*WARNING* (DB-270337): Failed to open cellView (opin symbol) from lib (NangateOpenCellLibrary) in 'r' mode because cellview does not exist.
*WARNING* Missing Masters:
Library Cell View 
NangateOpenCellLibrary ipin symbol 
NangateOpenCellLibrary opin symbol

and when I try to run LVS (between imported GDS layout and verilog netlist exported from Encounter), I get a bunch of these errors:


ERROR (OSSHNL-366): Instance 'I4' in cellview 'NangteOpenCellLibrary/AND2_X4/schematic' is bound to placed master 'NangateOpenCellLibrary/ipin/symbol'.
However, OSS has determined that it is not a valid placed master. Ensure that
cds.lib has entries for all the reference libraries and netlist again. Correct
this error and netlist again.

*WARNING* (DB-270337): Failed to open cellView (ipin symbol) from lib (NangateOpenCellLibrary) in 'r' mode because cellview does not exist.

*WARNING* (DB-270337): Failed to open cellView (ipin symbol) from lib (NangateOpenCellLibrary) in 'r' mode because cellview does not exist.
*WARNING* (DB-270337): Failed to open cellView (ipin symbol) from lib (NangateOpenCellLibrary) in 'r' mode because cellview does not exist.
*WARNING* (DB-270337): Failed to open cellView (ipin symbol) from lib (NangateOpenCellLibrary) in 'r' mode because cellview does not exist.


Any suggestions ?

  • Andrew Beckett

    Where did you get the library from? I just downloaded the NangateOpenCellLibrary_PDKv1_3_v2010_12.tgz version from:

    which I got to from a bit of a google search - from 

    In this kit, I looked in NangateOpenCellLibrary_PDKv1_3_v2010_12/Back_End/virtuoso and there's a library NangateOpenCellLibrary; if I open AND2_X4/schematic from this library, the pins are found OK - they are contained within that library (you can see them in the library manager).

    So I can only assume you've got the library from somewhere else, it's a different version, or somebody has messed with it.

    Regards,

    Andrew.

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