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Encountering errors while running Monte Carlo Simulation using UMC foundary files

archanaPK

I am trying to run Monte-Carlo analysis in cadence virtuoso ( IC617.500.17, Spectre 161). I am using UMC foundry process development kit for the 180nm node. After doing all the steps in running Monte-Carlo analysis, finally, some errors are occurring. I think the errors are related to the Monte Carlo files provided by UMC Library. I don’t have much knowledge about the codes given inside the file provided by UMC. I request your help to give some insights for solving the same.

The details regarding the issue are attached below:

 1. In the ADEL setup, I have added all the required Monte Carlo library files.

2. In ADEXL, after running the Monte Carlo simulation, initially, I got an error which says “certain parameters( like dtox_n_18_mm_t ) were previously defined, add ‘+spice’ in the command line or option ‘redefinedparams’ in netlist to avoid these type of errors.” A screenshot of that error is attached below:

3. With the help on this error obtained from an online forum, in the ADEL window under

“Simulations   ->   Options  ->   Analog     ->   Check   ->  redefinedparams , I selected ignore option as shown below.

I ran the simulation again. Then a new set of error came. One of the error is regarding an unknown parameter ‘sigma’ another is regarding defining of the same parameter twice. The screenshot of this error is given below.

What shall I do to resolve them? I 

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  • Andrew Beckett

    This sounds as if you're including all the model files twice (or loading multiple model files which define different versions of the same model names) - which probably is why the original problem occurred.

    Take a look at the include statements at the top of your input.scs files to see what is happening - maybe it will be obvious from that. Otherwise, I'd suggest contacting customer support as seeing what you're doing would be much easier than guessing what the mistake is.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    This sounds as if you're including all the model files twice (or loading multiple model files which define different versions of the same model names) - which probably is why the original problem occurred.

    Take a look at the include statements at the top of your input.scs files to see what is happening - maybe it will be obvious from that. Otherwise, I'd suggest contacting customer support as seeing what you're doing would be much easier than guessing what the mistake is.

    Regards,

    Andrew.

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