Spectre simulation question

[ÎâĆóÖÜ(sanguine)]

Hi All
I have a question about the simulation by spectre.

When I simulate a netlist for transient analysis, a fatal error will be report at one time . The error message is "fatal error found by spectre during transient analysis tran".

Who can tell me the reason of the error and how to resolve this question.
Thanks very much

Best Regards

 

[S. Badel]

excuse me but you should look further down in the log
file.
typically spectre will complain with the message you described,
followed by an explanation.
if you can't figure out just post the log file.

st¨Śphane


ÎâĆóÖÜ(sanguine) wrote:

Hi All
I have a question about the simulation by spectre.

When I simulate a netlist for transient analysis, a fatal error will
be report at one time . The error message is "fatal error found by
spectre during transient analysis tran".

Who can tell me the reason of the error and how to resolve this
question.
Thanks very much

Best Regards

 

[harry]

Hi stephane,
possible problem is that u messed up ur timing on the pwl's or
voltages sources.
or u made some changes in design and didn't save it.and ran ur
simulations.
Also check ur output log or CIW window for error messages.It should
tell u what the problem is.

regards

Harry


"S. Badel" <stephane.badel@REMOVETHISepfl.ch> wrote in message news:<411b2319$1@epflnews.epfl.ch>...

excuse me but you should look further down in the log
file.
typically spectre will complain with the message you described,
followed by an explanation.
if you can't figure out just post the log file.

st¨Śphane


ÎâĆóÖÜ(sanguine) wrote:
Hi All
I have a question about the simulation by spectre.

When I simulate a netlist for transient analysis, a fatal error will
be report at one time . The error message is "fatal error found by
spectre during transient analysis tran".

Who can tell me the reason of the error and how to resolve this
question.
Thanks very much

Best Regards

 

[Sajan]

Hi
I am having a problem with spectre simulation.

Fatal error found by spectre during topology check.
The following branches form a loop of rigid branches (shorts) when
added to
the circuit:
TOP.TEST1:SUS_DRVR_EN_flow (from TOP.SUS_DRVR_EN to ground)
TOP.TEST1AD_DP_flow (from TOP.PAD_DP to ground)
TOP.TEST1:VSSA_PSUB_flow (from TOP.VSSA_PSUB to ground)
spectre terminated prematurely due to fatal error.

This is what I see.

But all the signals mentioned in the log are just being driven by me
in the testcase as

V(SUS_DRV_EN) <+ 0;
V(PAD_DP) <+ 1.2;
V(VSSA_PSUB) <+ 0;

So can anybody help me why I am getting this error???
Thanks,
Sajan.



hsingh@ece.pdx.edu (harry) wrote in message news:<20b57af6.0408170002.a2d418c@posting.google.com>...

Hi stephane,
possible problem is that u messed up ur timing on the pwl's or
voltages sources.
or u made some changes in design and didn't save it.and ran ur
simulations.
Also check ur output log or CIW window for error messages.It should
tell u what the problem is.

regards

Harry


"S. Badel" <stephane.badel@REMOVETHISepfl.ch> wrote in message news:<411b2319$1@epflnews.epfl.ch>...
excuse me but you should look further down in the log
file.
typically spectre will complain with the message you described,
followed by an explanation.
if you can't figure out just post the log file.

stĄ§?phane


???¨Ž??(sanguine) wrote:
Hi All
I have a question about the simulation by spectre.

When I simulate a netlist for transient analysis, a fatal error will
be report at one time . The error message is "fatal error found by
spectre during transient analysis tran".

Who can tell me the reason of the error and how to resolve this
question.
Thanks very much

Best Regards

 

[Andrew Beckett]

Are there any connections above which complete the loop?

Andrew.

On 19 Aug 2004 04:05:46 -0700, s_sajan_s@yahoo.com (Sajan) wrote:

Hi
I am having a problem with spectre simulation.

Fatal error found by spectre during topology check.
The following branches form a loop of rigid branches (shorts) when
added to
the circuit:
TOP.TEST1:SUS_DRVR_EN_flow (from TOP.SUS_DRVR_EN to ground)
TOP.TEST1AD_DP_flow (from TOP.PAD_DP to ground)
TOP.TEST1:VSSA_PSUB_flow (from TOP.VSSA_PSUB to ground)
spectre terminated prematurely due to fatal error.

This is what I see.

But all the signals mentioned in the log are just being driven by me
in the testcase as

V(SUS_DRV_EN) <+ 0;
V(PAD_DP) <+ 1.2;
V(VSSA_PSUB) <+ 0;

So can anybody help me why I am getting this error???
Thanks,
Sajan.



hsingh@ece.pdx.edu (harry) wrote in message news:<20b57af6.0408170002.a2d418c@posting.google.com>...
Hi stephane,
possible problem is that u messed up ur timing on the pwl's or
voltages sources.
or u made some changes in design and didn't save it.and ran ur
simulations.
Also check ur output log or CIW window for error messages.It should
tell u what the problem is.

regards

Harry


"S. Badel" <stephane.badel@REMOVETHISepfl.ch> wrote in message news:<411b2319$1@epflnews.epfl.ch>...
excuse me but you should look further down in the log
file.
typically spectre will complain with the message you described,
followed by an explanation.
if you can't figure out just post the log file.

stĄ§?phane


???¨Ž??(sanguine) wrote:
Hi All
I have a question about the simulation by spectre.

When I simulate a netlist for transient analysis, a fatal error will
be report at one time . The error message is "fatal error found by
spectre during transient analysis tran".

Who can tell me the reason of the error and how to resolve this
question.
Thanks very much

Best Regards

--
Andrew Beckett
Senior Technical Leader
Custom IC Solutions
Cadence Design Systems Ltd