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APS-PSS error: "ERROR: ZERO DIAG reordering in Matrix factor"

Aldo2

Hello!

How can I avoid the following error running an aps-pss with mmsim 10.1?

Error found by spectre during periodic steady state analysis `pss'.
    ERROR: ZERO DIAG reordering in Matrix factor
    ERROR: ZERO DIAG reordering in Matrix factor
    ERROR: ZERO DIAG reordering in Matrix factor
    ERROR: ZERO DIAG reordering in Matrix factor
    ERROR: ZERO DIAG reordering in Matrix factor

...

Thank you

Aldo

Parents

  • Hello Mr. Beckett,

     I have experienced the same problems as Aldo:

    When using the spectre-pss everything works fine, when I switch to aps-pss I will get the error message:

    ERROR: ZERO DIAG...

    (Error message after finishing the third iteration.)

     Has anything happened since Aldo posted the request?

    (The autofund=yes did not fix the problem.)

     

    ****************************************************
    Periodic Steady-State Analysis `pss': fund = 200 MHz
    ****************************************************
    Trying `homotopy = gmin' for initial conditions.
    Zero diagonal found in Jacobian at `I1125.I81:out_flow' and `I1125.out1'.
    Zero diagonal found in Jacobian at `I1125.I81:out_flow' and `I1125.out1'.
    Zero diagonal found in Jacobian at `I1125.I81:out_flow' and `I1125.out1'.
    Zero diagonal found in Jacobian at `I1125.I81:out_flow' and `I1125.out1'.
    Zero diagonal found in Jacobian at `I1125.I81:out_flow' and `I1125.out1'.
    Trying `homotopy = source' for initial conditions.
    Trying `homotopy = dptran' for initial conditions..
    Zero diagonal found in Jacobian at `net035' and `net035'.
    Zero diagonal found in Jacobian at `net035' and `net035'.
    Zero diagonal found in Jacobian at `net035' and `net035'.
     

     I think the problem is hidden somewhere in the above lines, which aps shows, but spectre does not (copied from outputLog).

    Regards,

    matzowicz

Reply

  • Hello Mr. Beckett,

     I have experienced the same problems as Aldo:

    When using the spectre-pss everything works fine, when I switch to aps-pss I will get the error message:

    ERROR: ZERO DIAG...

    (Error message after finishing the third iteration.)

     Has anything happened since Aldo posted the request?

    (The autofund=yes did not fix the problem.)

     

    ****************************************************
    Periodic Steady-State Analysis `pss': fund = 200 MHz
    ****************************************************
    Trying `homotopy = gmin' for initial conditions.
    Zero diagonal found in Jacobian at `I1125.I81:out_flow' and `I1125.out1'.
    Zero diagonal found in Jacobian at `I1125.I81:out_flow' and `I1125.out1'.
    Zero diagonal found in Jacobian at `I1125.I81:out_flow' and `I1125.out1'.
    Zero diagonal found in Jacobian at `I1125.I81:out_flow' and `I1125.out1'.
    Zero diagonal found in Jacobian at `I1125.I81:out_flow' and `I1125.out1'.
    Trying `homotopy = source' for initial conditions.
    Trying `homotopy = dptran' for initial conditions..
    Zero diagonal found in Jacobian at `net035' and `net035'.
    Zero diagonal found in Jacobian at `net035' and `net035'.
    Zero diagonal found in Jacobian at `net035' and `net035'.
     

     I think the problem is hidden somewhere in the above lines, which aps shows, but spectre does not (copied from outputLog).

    Regards,

    matzowicz

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