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# Error !!! -- >> Comment?? -->> Thanks

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While simulating a very simple R-C circuit to test tools setup correctly,
I chose Spectre as simulation host, and when running simulation, it was aborted and displays the following error message:

Code:
Command line:
/usr/local/cdstree/tools.lnx86/spectre/bin/32bit/spectre -env  \
artist5.1.0 +escchars +log ../psf/spectre.out +inter=mpsc  \
+mpssession=spectre0_6675_2 -format psfbin -raw ../psf  \
+lqtimeout 900 input.scs
spectre pid = 7053

spectre (ver. 5.10.41.082405 -- 24 Aug 2005).
Includes RSA BSAFE(R) Cryptographic or Security Protocol Software from RSA
Security, Inc.

Simulating input.scs' on linux at 5:37:38 PM, Mon Feb 12, 2007.

Error found by spectre during hierarchy flattening.
V0: Waveform type must be specified if any waveform parameters are given.

spectre terminated prematurely due to fatal error.`
See attached image..
What can this error be due to?
Thanks,

#### holddreams

##### Full Member level 6
It's better to upload the *.scs file or the stimulus you simulated.
It seems that the V0 is something wrong.

Points: 2

#### frankaurora

##### Junior Member level 1
if u use vsin,u can replace it with vsource and try it again

Points: 2

#### pfd001

V0: Waveform type must be specified. it should be DC, PWL,

Points: 2

#### gafsos

##### Full Member level 3
it's seen that the Pb comes from ur netlist
try to verify all ur inputs
why u do not use ELDO as simulator ELDO is better than spectre
gafsos

Thank you all for replies,
But i wanna to clarify somethings..

When i changed simulation-host to be SpectreS instead, it worked fine...

No problems with schematic...

I don't have license for Eldo ... Moreover, i don't know if it can work from Cadnce or not..

I didn't attach the schematic to any tech. file ... as i didn't install the PDK yet,

Thanks,

#### holddreams

##### Full Member level 6
You can generate the netlist and check whether the VO is correct or not.

Points: 2

holddreams said:
You can generate the netlist and check whether the VO is correct or not.

How?

#### salem_eng1

##### Member level 2
I got the same problem and it solved when I use vsourse instead of vsin & also solved when I used spectreS simulator instead of spectre simulator only

Thanx for this informations

Points: 2

SpectreS is different than Spectre (actually worse than it, and less features)!

Moreover, you can't always use SpectreS to solve the problem..

Anyway, I left the Vsin source V0 as it's, but changed it properties to have 0 DC Voltage, as well as certain Amplitude and frequency (in my case i took them 100m V and 10M Hz as an example, but it don't matter), I was missing the DC Voltage, when i added it, it worked fine even on Spectre simulator without errors..

Also, notice that for components you used in your circuit, u r using their Spectre view (default is symbol view).

Thank you all for participation.
BR,