i:nil="true" in soap response from .NET application

In response to a webservice call, we are receiving a field value as <a:SLA_Days i:nil=“true”/>. WebMethods soap client service hangs on such response and log below error message in the error log,

com.wm.app.b2b.server.ServiceException: [ISS.0088.9139] Output parameters do not conform to targetOutputSignature: errorCode=VV-006 pathName=/tns:RetrieveExceptionsResponse/tns:RetrieveExceptionsResult/q1:Processes/q1:ProcessStep[0]/q1:Exceptions/q1:Exception[0]/q1:SLA_Days errorMessage=[ISC.0082.9035] Value cannot be null, allow null value is false errorCode=VV-006 pathName=/tns:RetrieveExceptionsResponse/tns:RetrieveExceptionsResult/q1:Processes/q1:ProcessStep[0]/q1:Exceptions/q1:Exception[1]/q1:SLA_Days errorMessage=[ISC.0082.9035] Value cannot be null, allow null value is false.
Also, the service is getting hang for such a response.

The target application is .NET and on discussion with support. they informed that this is expected response for a integer field (in this case SLA_Days).

For testing purpose can you try to turn off the SOAP Response validation on the IS and see if that resolves your issue.

watt.server.soap.validateResponse=false.

Cheers,
Akshith