SOAP Error - XIServer:NO_MAPPINGPROGRAM_FOUND

I am getting an exception with SOAP scenarios in my SAP XI server. All these scenarios were well tested and were working fine. But suddenly, its throwing an exception.

The exception is as below:

-

http://schemas.xmlsoap.org/soap/envelope/">

<SOAP:Body>

<SOAP:Fault>

<faultcode>SOAP:Server</faultcode>

<faultstring>Server Error</faultstring>

<detail>

http://sap.com/xi/WebService/xi2.0">

<context>XIAdapter</context>

<code>DeliveryException</code>

<text><![CDATA[

com.sap.aii.af.ra.ms.api.DeliveryException: XIServer:NO_MAPPINGPROGRAM_FOUND:

at com.sap.aii.adapter.xi.ms.XIEventHandler.onTransmit(XIEventHandler.java:451)

at com.sap.aii.af.ra.ms.impl.core.queue.CallConsumer.onMessage(CallConsumer.java:125)

at com.sap.aii.af.ra.ms.impl.core.queue.Queue.run(Queue.java:831)

at com.sap.engine.frame.core.thread.Task.run(Task.java:64)

at com.sap.engine.core.thread.impl5.SingleThread.execute(SingleThread.java:79)

at com.sap.engine.core.thread.impl5.SingleThread.run(SingleThread.java:150)

]]></text>

</s:SystemError>

</detail>

</SOAP:Fault>

</SOAP:Body>

</SOAP:Envelope>

-

I tried doing CACHE refresh. But no result.

If anyone of you have experienced this kind of problem then please help me out.

Thanks,

Vijay