I've got an InfoPath 2007 form which has previously worked but now when I submit the form I get the error "the soap message cannot be parsed". I don't know exactly what changed on the environment because it's a customer environment which we're debugging together...

I can't see anything wrong with the MainSubmit web service the form submits to, and the published UDCX file is correct. The user does have rights to start the process.

Anyone seen something like this before?

Thanks in advance...