$element->delete() does not take an argument, it deletes the element itself, I think you intend for those deletes to be more like (this takes care of all in one go):
# Delete BAL_* nodes
$balance->cut_children(qr/^BAL_\d+$/);

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Note also that you are not deleting the BAL_30 and BAL_60 nodes, so you end up with two each of those (the originals and the ones you create with attributes). The cut_children() above assumes you didn't want the duplicates.

In reply to Re: XML-Twig - AS5.6.1 vs AS 5.8.8 by runrig
in thread XML-Twig - AS5.6.1 vs AS 5.8.8 by drmikec

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