Sender HTTP_AAE adapter Error: ERROR_IN_MODULECHAIN

[#1]

I have a scenario for HTTP to Proxy web service. In my requirement, the web service that should receive an XML message sent through an HTTP POST call. The XML message will be sent in the HTTP body. No form submission. My web service works when the XML request message matches the structure of the request message structure of PI Message Type, as specified in the service interface. The problem is that when the XML request message is different, say, any XML string, the web service call fails with the error " Error: ERROR_IN_MODULECHAIN;ERROR_IN_MODULECHAIN, Sender Channel " I created a Java mapping program to parse the source message ... It seems like an error occurs before the mapping program is called. Any suggestion?

Here is what I have in Sender Communication Channel:

Adapter Type: HTTP_AAE

Transport Protocol: HTTP 1.1

Message Protocol:POST

Direction: SENDER