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Assembler: Can't use VAR() in output expression when EvalType is sweeps, all i.e. not point

Hi,

I am trying to check some output expressions with evaltype set to sweeps. In these expressions, I have some variables from my global variables. For the run, I am sweeping some variables and some of them are fixed. I want to use one of the fixed in the output expressions but I am getting evaluation when I use VAR() as below. If I change this a fix number, I don't see an issue and everything works.

Example Output Expression:

value(dB20(VF("/Iinstimulus/DIFF_OUT")) VAR("fclk")) ~> Not working

value(dB20(VF("/Iinstimulus/DIFF_OUT")) 1e9) ~> working

Also, the working one doesn't return numeric value, I had to put another function converting wave to numeric(ymax() to be specific). Why doesn't it return numeric value like regular output expressionswith point as evaltype?

Version info:

Spectre (R) Circuit Simulator
Version 20.1.0.354.isr11 64bit -- 14 Oct 2021

ICADVM20.1-64b.500.25

Andrew Beckett over 3 years ago

Please contact customer support.

Andrew
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ayayla over 3 years ago in reply to Andrew Beckett

For others having the same issue, VAR() returns a wave so that is the root-cause of the issue. Instead of VAR(), using ALIAS() solves the issue since that returns a scalar as explained in the below support page:

support.cadence.com/.../ArticleAttachmentPortal

So solution is using ALIAS() if variables are not being swept since it returns the first value of VAR()(kind of wrapper around VAR()).
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