Forms Services Form Error on postback

[Oliver]

Hi Everyone,

i got a bit of a problem with my Infopath Form on the MOSS Forms Services.
The form contains Business Code via C# and receives all its data through
udcx-files. If i open the form in Infopath itself everything works fine. If I
switch to the browser the form again open without problems. But when I
trigger an action that requires a rountrip to the server - e.g. validation,
load data from udcx files, an error gets displayed stating that there was a
problem with my form. I digged a bit deeper into the log file of MOSS and
discovered the following error:

Unhandled exception when rendering form System.Xml.XmlException: Unexpected
end of file while parsing Name has occurred. Line 1, position 863. at
System.Xml.XmlTextReaderImpl.Throw(Exception e) at
System.Xml.XmlTextReaderImpl.Throw(String res, String arg) at
System.Xml.XmlTextReaderImpl.Throw(Int32 pos, String res, String arg) at
System.Xml.XmlTextReaderImpl.ParseQName(Boolean isQName, Int32 startOffset,
Int32& colonPos) at System.Xml.XmlTextReaderImpl.ParseAttributes() at
System.Xml.XmlTextReaderImpl.ParseElement() at
System.Xml.XmlTextReaderImpl.ParseElementContent() at
System.Xml.XmlTextReaderImpl.Read() at
System.Xml.XmlLoader.LoadNode(Boolean skipOverWhitespace) at
System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc) at
System.Xml.Xml...

This is absolutely non-saying to me. Has anyone any idea of what the problem
is ? I already tried to give the form more memory (40MB instead of only 4MB)
the problem persists.

Thanks,
Oliver