Error in mupadmex eval function

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Madeleine Fort
Madeleine Fort on 16 Jul 2014
So I'm trying to do circuit evaluation. Sometimes it evaluates fine and I get solved variables, but often I get the following error:
Error using mupadmex
Error in MuPAD command: Cannot define a matrix over 'Dom::ExpressionField()'.
[(Dom::Matrix(Dom::ExpressionField()))::new]
Error in sym/subsref (line 687)
B = mupadmex('symobj::subsref',A.s,inds{:});
Error in CircuitGA (line 327)
eval([char(X(i)) '=' char(V(i)) ';']);
Does anyone know why this is happening? Is there a fix?
  1 Comment
Christopher Creutzig
Christopher Creutzig on 29 Aug 2014
It's unlikely anyone can know that without you providing a minimal complete self-contained example that shows the bug.
From the snippet you sent, I assume the primary problem is the use of char and eval. That is fragile and should not be necessary for symbolic computations in the first place.

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