On Jul 7, 9:35=A0pm, Andrew Beckett <andr...@[EMAIL PROTECTED]
>
wrote:
> bageduke wrote, on 07/05/08 02:44:
>
> > I am doinglongtransientsimulation for 100us. The simulation is
> > still running, but everytime when I tried to plot signal, it only
> > plotted up to 36us, but actually output log shows the simulation
> > already run more than 50us without any error, and thetransientresult
> > file size still keep increasing.
>
> > Have you ever seen this problem before? Does this mean the result is
> > corrupted? Or is there anyway I can fix the problem?
>
> > Thanks a lot.
>
> Are you using IC5141 with spectre from an MMSIM release? If so, you
proba=
bly
> need to re-enable the "chunk" mode for writing PSF. In older spectre
vers=
ions,
> big files used to get split into 2Gbyte chunks, because large file
sup****=
t was
> not particularly common in many OS versions. However, that's no longer
tr=
ue - so
> spectre from MMSIM61 changed to write largetransientPSF into a single
big
> file. However, sup****t for reading such big files wasn't added into IC61
=
(I
> think), and so if running a new spectre with IC5141, you need to do:
>
> For Spectre writing PSF data:
>
> =A0 setenv PSF_WRITE_CHUNK_MODE_ON true
>
> For UltraSim writing PSF data:
>
> =A0 setenv PSF_LARGE_FILE_ON false
>
> Regards,
>
> Andrew.
Hi Andrew,
I have a similar problem. I am simulating a sigma-delta converter and
only the first 19 clock cycles would be displayed, despite simulating
for 1024 or more, and the simulation clearly running through to
completion.
I enabled the above environment variables and found that I could see
the first 177 cycles in AWD - a vast improvement - and the entire
waveforms in Wavescan. But any calculator functions I do on those
waveforms are only using the first 177 cycles.
This does not appear to be related to the tran.tran file size - I have
tried using various errprst settings and only saving every 10 points,
etc.
Any ideas?
David.
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