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Subcircuit string parameters will not pass to a SUBCKT NET=, but works with local variable.

FormerMember
FormerMember

Hello,

I'm trying to pass the name of an s2p Data File into a subcircuit parameter so I can have a subcircuit with a big template but change the s2p being used in that subcircuit by variable name.

It works if I set the name of the s2p datafile in the subcircuit, but it does not work if I pass the s2p data file name as a string argument to the subcircuit.  The first image shows it working with A="100A0R5" and the second image shows the error with A<<"100A0R5".  Is this some kind of bug when passing strings to subcircuits and using them with NET= in a sub-subcircuit?  I have attached a small test project to demonstrate the problem.  Just change the A<< parameter to an A= variable in the S2 schematic and press F8 to render the graph:

Working:

Not Working:

Here is the error:

Here is the .emz:

Subcircuit Parameter Test.zip

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  • FormerMember
    FormerMember

    Oh, I got it to work!  You have to right-click on the A<<"String" EQN and set its datatype to a string.

    Maybe someone can pass this on to the developers: it sure would be nice if the error said something like "Error evaluating parameter 'A', expecting variable type of 'String'" or something similar.  It would have at least pointed me in the right direction.

  • FormerMember
    FormerMember in reply to FormerMember

    Actually I think the error in this example might more accurately be something like "A@SUBCKT.S1 is of type Real but was passed a String"

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