Not directly related but I had the same error and google made me land here. You get the same error when you try to decode and specify a wrong encoding: I tried to decode to iso 8859-1 (latin-1) when it was utf-8.

In reply to Re^2: Encode throws "Wide character in subroutine entry" when using XML::Simple by Anonymous Monk
in thread Encode throws "Wide character in subroutine entry" when using XML::Simple by nglenn

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