Xml for post data was invalid (hexadecimal value 0x02)

[atymic]

Hi,

Having an issue with one of the requests to create an invoice, getting this error.
I added a log statement just before the request is sent, and the xml looks fine. I can't see any issues in it.

Exact exception:

XeroPHP/Remote/Exception/BadRequestException with message 'Xml for post data was invalid, '', hexadecimal value 0x02, is an invalid character. Line 149, position 251. ()'

I can provide the XML file directly if needed for debugging (it contains private info).

[calcinai]

Where exactly is that character? In the markup or the content?