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NULL pointer dereference

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Hi,

I am building an uVC using uRM in SVCB for the First time.
When I wanted to Access the Transaction item from the Driver using "get_next_item" predefined task(defined in urm_driver class library) it is generating an error as,

Error!  NULL pointer dereference
          File: /tools/cadence/ius/tools/urm/src/urm/sv/urm_unit.svh, line = 119, pos = 25
         Scope: top.urm_unit::m_get_message_handler
          Time: 20 NS + 1
Verilog Stack Trace:
0: function top.urm_unit::m_get_message_handler at /tools/cadence/ius/tools/urm/src/urm/sv/urm_unit.svh:119
1: task top.urm_driver::get_next_item at /tools/cadence/ius/tools/urm/src/uvc/sv/urm_driver.sv:546
2: task top.master_bfm@876_2.drive_transfers at   sv/master_bfm.sv:85
3: process in top.master_bfm::run at /sv/master_bfm.sv:58

Infact I am not Using any TLM ports as of now.
I am Puzzled by this error, I will be Thankful for the Suggestions.

Regards,
Ramesh Pal Yadav


Originally posted in cdnusers.org by ramesh_pal_yadav
Parents

  • Hi Ramesh,

    I presume you have some statement like:

      sequencer.get_next_item(item);

    in your driver.

    Have you remembered to assign the sequencer instance to the driver sequencer variable in your agent? e.g. you should have something like:

     driver.sequencer = seq_instance; 

    where driver and seq_instance are the driver and sequencer instance names in your agent

    If that is OK, have you configured your sequencer correctly?

    Hope that gives you some ideas.

    Regards,
    Dave


    Originally posted in cdnusers.org by dl_doulos
Reply

  • Hi Ramesh,

    I presume you have some statement like:

      sequencer.get_next_item(item);

    in your driver.

    Have you remembered to assign the sequencer instance to the driver sequencer variable in your agent? e.g. you should have something like:

     driver.sequencer = seq_instance; 

    where driver and seq_instance are the driver and sequencer instance names in your agent

    If that is OK, have you configured your sequencer correctly?

    Hope that gives you some ideas.

    Regards,
    Dave


    Originally posted in cdnusers.org by dl_doulos
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