Hi David,
You error, 2000 0077, indicates that the XML Runtime cannot interpret the incoming document. In this case it is the Web Service response it cannot interpret. There are a number of reasons why this might happen, maybe the most common of them all being that the response document used a different namespace than expected.
Later versions of EntireX have changed some so that this type of an error is quite rare.
I do not have a comparable environment but I believe you need only alter the namespace URI in the XML Mapping to match the web services namespace. Just deleting the value in the Mapping editor may also work.
I would normally suggest you open a support request but I see you are using a very old version of EntireX which is no longer supported. You should really consider upgrading to EntireX 8.2.1 which was just recently released.
Regards
#webMethods#Mainframe-Integration#EntireX