Help with debug of LuaXMLRPC

[Tim Channon]

This has been suggested as an appropriate place to ask.

I have hit a problem with using LuaXMLRPC (1.2.1) client only. This is
working fine over many MB of received data but a small proportion of
remote server responses trip a fatal error, complaining is not XML.
These fails are logged including the echoed suspect XML. These start
(removed local path)xmlrpc\\init.lua:545: Not an XML document: <?xml
version= (blah)
From that I can produce the suspect XML.

This passes 3rd party XML validation.
lxp is installed (passes client self test) and a test rig using lom
accepts the XML without complaint, producing the tag markers. Alter the
test source data by hand to illegal XML, lom then complains.

Factoring the problem now needs to check if lua xmlrpc will accept the
xml from a local copy (string or file), There is no local web server,
Kepler etc. is not installed.

It would help if someone familiar with the package could suggest how to
do this.

Thank you.