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calcVal function works during the simulation, but fails after initiating re-evaluation

A1vis 1 month ago

Hi.

I'm using Virtuoso 6.1.8-64b

While constructing an expression to compare the circuit with its nominal working condition, I'm trying to reference the value of an expression for a specific corner. So I wrote

calcVal("value_x" ?cornerName "C_nominal")

calcVal("value_x" "test_name" ?cornerName "C_nominal")

Now as the simulation run, this expression does evaluate to what I want. But as soon as I made any changes to the output setup, however irrelevant with any part of the expression, evaluation error is reported. I must run the simulation again to see the comparison.

What have I done wrong? Thanks for any advice!

Andrew Beckett 1 month ago

A1vis said:
I'm using Virtuoso 6.1.8-64b

That's not very specific - there are sub-versions of IC6.1.8 which span 6 years, so it would be helpful to know which sub-version you're using. This is shown either in the Help->About menu or by calling getVersion(t) in the CIW.

Thanks,

Andrew
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A1vis 1 month ago in reply to Andrew Beckett

Thanks for replying! It's IC6.1.8-64b.500.15
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Andrew Beckett 1 month ago in reply to A1vis

Before I try to reproduce this in an older version, I suspect it's highly likely that this has been fixed in the meantime. ISR15 is pretty old, and the latest (ISR36) is from late 2024. Can you try the latest IC6.1.8 hotfix version?

Andrew
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A1vis 1 month ago in reply to Andrew Beckett

Rather difficult for me, that would be. It's installed in my corporate environment, and I'm unable to make any changes pertaining to the setup
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Andrew Beckett 1 month ago in reply to A1vis

OK, but it's not going to get fixed by using the same version you're using right now anyway - it's almost certainly a bug, and moving to a newer IC version with the fix is the only viable solution. I don't know for certain that it's fixed in ISR36, but I don't recall seeing (recently) any issues that match your symptoms (and it's not a particularly unusual thing to do).

Andrew
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A1vis 1 month ago in reply to Andrew Beckett

I guess for me I can only avoid using this function...Just out of curiosity, is this function rather "new" for the version that I'm using? I'd expect it to be stabilized.
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Andrew Beckett 1 month ago in reply to A1vis

No, it's not that new - but there has been an ever increasing set of options for calcVal to cover different scenarios. Occasionally things break which cause it to fail in particular hotfix releases due to something having been updated but some use model being overlooked.

I'm pretty surprised that your company restricts you to only having access to a specific sub-version from (almost) 5 years ago (it's from November 2020).

Andrew
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A1vis 1 month ago in reply to Andrew Beckett

I see. Again, thanks for your help!
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