I've just noticed some strange behavior in the AXL DoSQLQuery method, in CUCM 12.5.1. Sometimes the XML response object is truncated. The response content begins with the standard soapenv:Element tag, the results, but the document is incomplete.
This happens randomly; sometimes the same query will return perfectly fine, just seconds later.
This behavior seems to occur for larger results, maybe over 600 K bytes.
When it happens, there is no error message or faultcode.