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waveform dump problem using SystemVerilog

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Hi ,
     I am using NcVerilog 5.6 with +sv option to enable SystemVerilog.
I am getting the following error during simulation.

***Current stack trace:
 -->[Don't Know      ] 0         't know>
 -->[Don't Know      ] 5d62b0    ncdbg_exit           + 1bdc
 -->[Don't Know      ] 3eb568    sss_tag_dbend        + 520
 -->[VPI Overhead    ] 136a3c    vpi_tag_ostart       + 191b4
 -->[VPI Overhead    ] 136afc    vpi_tag_ostart       + 19274
 -->[VPI Overhead    ] 1385a8    vpi_tag_ostart       + 1ad20
 -->[VPI Overhead    ] 156f68    vpi_tag_ostart       + 396e0
***Verilog source where error occurs:
   $recordfile(...) (PLI calltf)
        Module: TB_TST
        Instance: TB_TST
        File: ./TB_TST.v
        Line: 422
ncverilog: *E,SIMERR: Error during Simulation (status 255), exiting.

Can somebody help me.
I am using $recordfile("./filename");
                  $recordvars();
Are these PLI's not supported in SystemVerilog.


Originally posted in cdnusers.org by ravurig
Parents

  • Posted By ravurig on 4/01/2007 5:44 PM
    Hi ,
         I am using NcVerilog 5.6 with +sv option to enable SystemVerilog.
    I am getting the following error during simulation.


       $recordfile(...) (PLI calltf)
            Module: TB_TST
            Instance: TB_TST
            File: ./TB_TST.v
            Line: 422
    ncverilog: *E,SIMERR: Error during Simulation (status 255), exiting.

    Can somebody help me.
    I am using $recordfile("./filename");
                      $recordvars();
    Are these PLI's not supported in SystemVerilog.

    Hi Ravi,
        This is a classical problem when simulators move onto becoming full fledged verification platforms. Honestly I'm surprised to see this with NCSIM though. As a quick fix, try:

      $recordvars(top.dut);

    This would make sure you dump your DUT signals without bothering about TB stuff. I've seen similar issues with other tool(s), but given the success of Specman's amazing dumping capability I thought Cadence would have done a better job here.

    Also check with CDN help desk on when they would support this TB dumping. I've an article in making on "Debugging Testbenches in SystemVerilog" - this will be little tool specific and will require some methodology help etc. It is not in a shape to be shared right now, but if you are based in Bangalore drop me an email ajeetha <> gmail.com and we can come and talk to you in person on this topic.

    Regards
    Ajeetha, CVC
    www.noveldv.com  


    Originally posted in cdnusers.org by ajeetha
Reply

  • Posted By ravurig on 4/01/2007 5:44 PM
    Hi ,
         I am using NcVerilog 5.6 with +sv option to enable SystemVerilog.
    I am getting the following error during simulation.


       $recordfile(...) (PLI calltf)
            Module: TB_TST
            Instance: TB_TST
            File: ./TB_TST.v
            Line: 422
    ncverilog: *E,SIMERR: Error during Simulation (status 255), exiting.

    Can somebody help me.
    I am using $recordfile("./filename");
                      $recordvars();
    Are these PLI's not supported in SystemVerilog.

    Hi Ravi,
        This is a classical problem when simulators move onto becoming full fledged verification platforms. Honestly I'm surprised to see this with NCSIM though. As a quick fix, try:

      $recordvars(top.dut);

    This would make sure you dump your DUT signals without bothering about TB stuff. I've seen similar issues with other tool(s), but given the success of Specman's amazing dumping capability I thought Cadence would have done a better job here.

    Also check with CDN help desk on when they would support this TB dumping. I've an article in making on "Debugging Testbenches in SystemVerilog" - this will be little tool specific and will require some methodology help etc. It is not in a shape to be shared right now, but if you are based in Bangalore drop me an email ajeetha <> gmail.com and we can come and talk to you in person on this topic.

    Regards
    Ajeetha, CVC
    www.noveldv.com  


    Originally posted in cdnusers.org by ajeetha
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