"warning: unknown evaluation type (58) in brEvalCopy&am

I have two lists named argStack and args. args is empty, argStack has numerous items, then I tried the following:

push (pop argStack) onto args.
push (pop argStack) onto args.

This produces the error

warning: unknown evaluation type (58) in brEvalCopy

and after the simulation is manually stopped breve crashes. Is this usage of subexpression not legal?

"warning: unknown evaluation type (58) in brEvalCopy&am

Which version of breve? This should be valid code and I cannot reproduce the problem with a simple test. Perhaps it's dependent on the type of value in argStack?

- jon

"warning: unknown evaluation type (58) in brEvalCopy&am

Seems like I produced the error: I have to test some lines of code again, but the exception is perhaps produced by the empty-stack-pop-bug, so that did not breve quit because of the expression.
I will control my code if there is a bug which tries to read from an empty list..

"warning: unknown evaluation type (58) in brEvalCopy&am

Yepp, it was a false alarm, sorry. I did a mistake which produced the error of accessing an empty list, breve accepts the inner expressions without problems. I think the odd exception warning made me nervous.

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