How to define a current measurement in ADEXL + Montecarlo using AMS Designer

Hi All,

I am facing the following issue:

1. I am currently setting up some montecarlo simulations using AMS Designer in ADEXL.
2. I need to define a current measurement to be performed during the Montecarlo runs (at 700 us), that I set up in the following way: value(i("/R15/MINUS") 0.0007)
3. However, for whatever a reason, the measurement fail for each montecarlo run; following you see the error I get at each montecarlo run (this is an extract of the Job.log):

\o ERROR (ADE-2709): Evaluation of output 'test1' returned 'nil' for point:'1' test:'wk_kris:sim_test:1'

\o           Expression:'value(i("/R15/MINUS") 0.0007)'.

\o Ensure that the definition of output is correct.

Could it be that my syntax is wrong? If yes, could you please suggest me the correct one?

Thanks in advance!

I combined your two posts (please read the forum guidelines (pinned post at the top of each forum) which ask you not to file the same question in more than one forum.

Your expression needs to be either:

value(i("/R15/MINUS" ?result "tran") 0.0007)

or

value(IT("/R15/MINUS") 0.0007)

Otherwise it won't know which analysis to get the result from.

Andrew

Hi Andrew,

Thanks for replying me. I will try and let you know.

By the way, regarding my double post, yes I read the forum guidelines and, in fact, I wanted to delete the one filed in the other community but, I don't know why, I was not able to perform the action (I was getting an error). But I see that you did it for me. Thanks a lot!

Hi Andrew,

I tried your suggestions, but now the error changed in a new one:

ERROR (ADE-2708): Evaluation of output 'test3' failed for point:'1' test:'wk_kris:test:1'
\o Expression:'value(i("/R15/PLUS" ?result "tran") 0.0007)'
\o because of the following error(s)
\o *Error* strcat: argument #1 should be either a string or a symbol (type template = "S") at line 0 of file "*stdin*".
\o Ensure that the definition of output is correct.

Any idea?

I found a report of an issue with identical symptoms - getting currents in AMS simulation with Monte Carlo, under CCR 2213678 (for my future reference). This was fixed in IC6.1.8-64b.500.10 (ISR10) and the same sub-version of ICADVM18.1 (all ICADVM20.1 versions would be OK since they are after this).

You didn't mention which IC sub-version you're using (the forum guidelines ask you to provide that too, since it helps narrow down issues that may already have been solved). My guess is that it's earlier than the version with the fix, so you would need to move to a more recent hotfix.

Regards,

Andrew

Hi Andrew,

The Xcelium version is: 19.09-s008

The Spectre version is: 18.1.0.397.isr8 64bit 

So it seems that I am in the buggy version or? If yes, then I have to look for a workaround... unfortunately.. :( 

Neither of those version numbers is relevant here. it's the IC version that matters (i.e. the Virtuoso version) - what you see in Help->About in any of the Virtuoso windows.

Regards,

Andrew

Sorry, my mistake; here the version you ask for:

IC6.1.8-64b.500.6.EHF7461

From the notes in the change request, this broke in ISR6 (I’m not 100% certain of that) and you’re using an engineering hot fix of ISR6. You should move to a later ISR version to solve this (ISR10 or later as I mentioned)

Ok. Unfortunately this cannot be done due to project rules. But, ok, if no workaround can be found, there is no other chance here. 

Thanks a lot for your support!