App Connect

Hello All,

There is a message flow here we have a soap request node to hit a webservice and get a response from it.While getting the SOAP response we receive http headers like below attached to the SOAP response.

HTTP/1.1 200 OK
Content-Type: text/xml
Server: IBM App Connect Enterprise
X-Ratelimit-Remaining
X-Ratelimit-Reset
Set-Cookie 
As a result of which we get the error

Catalog>BIPmsgs</Catalog>
                    <Severity>3</Severity>
                    <Number>3614</Number>
                    <Text>problem creating SOAP tree from bitstream</Text>

I understand the error is due to the soap:Envelope not being the root and the flow is unable to parse it .
My question is how to remove to http header  from the soap response 

Is it advisable to use the any node to clear http headers ?

My existing flow is as below :
queue->java compute->soap request->SOAPchecking logic(error and failure go to )->error handler
I don't want to touch the soap checking logic as its a common one and used by other apps too

Pleas help

Thanks 
Madhu