CADENCE-Error found in protected block by Virtuoso Spectre during circuit read-in

besart86 said:

Hi all,

I have a problem with montecarlo simulations in Cadence Spectre.

I am using Version 7.2.0.3007.isr10. And the technology is UMC180nm.

I am trying to do some montecarlo simulations using both "n_lv_33_mm" and "n_33_mm" transistors.

In fact, the simulations are performed well when I use only "n_33_mm" transistors. However, when I include "n_lv_33_mm" transistors in the schematics, it shows the following error:

Error found by spectre during circuit read-in.

ERROR (SFE-74) : Error found in protected block by Virtuoso (R) Spectre during circuit read-in.



Now, I have added the all three montecarlo corners and I think the model libraries corresponding to the low vt transistors are included. Not sure if i can post the full names of the model libraries here though.

If I don't use one of the MC corners, it will show the error:

ERROR (SFE-23) : "input.scs" M0 is an instance of an undefined model n_lv_33_mm.



Thanks in advance,

Bes

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