It's only a guess but since you mention "iteration" and don't show any, there's a reasonable chance that the problem is related to how you are performing this "iteration". If you can post a complete, small self-contained script, together with sample input data which demonstrates the problem it might then be possible to see precisely where the problem lies.

In reply to Re: XML::LibXML - could not create file parser context : no error by hippo
in thread XML::LibXML - could not create file parser context : no error by rbala

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