File Receiver adapter module Dynamic Configuration

Hi All
I have a adapter module in a receiver file adapter. In the code I try to access the file name through dynamic configuration,The file name gets set in the mapping.
String strFileName = msg.getMessageProperty(new MessagePropertyKey("FileName","http://sap.com/xi/XI/System/File"));
When my module get executed I get error: nested exception is: java.lang.NullPointerException: while trying to invoke the method com.sap.engine.interfaces.messaging.api.Message.getMessageProperty(com.sap.engine.interfaces.messaging.api.MessagePropertyKey) of an object loaded from local variable 'msg'
Is it possible to get file name in receiver adapter? if so why does this error occur?

Yes it is possible...chk this
/people/daniel.graversen/blog/2006/10/05/dynamic-configuration-in-adapter-modules
i guess u have added this import statement in ur code:
import com.sap.engine.interfaces.messaging.api.MessagePropertyKey;
Code will be soemthing like this (FOR PI7.1)
MessagePropertyKey mpk = new MessagePropertyKey("FileName","http://sap.com/xi/XI/System/File");
String filename = msg.getMessageProperty(mpk);
Thanks
Amit

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Thank you Raj for the direction
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1. In ID, advanced tab, put a check on the adapter-specific message attributes - file name.
2. Put a "*" on the file name scheme
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.getTransformationParameters()
.get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);
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Regards,
Idi

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Runtime exception during processing target field mapping /ns0:MaterialBITMAP_In. The message is: Exception:[java.lang.NullPointerException] in class com.sap.xi.tf._Test_Conversion_ method setfilename$[17092008, osinef, com.sap.aii.mappingtool.tf3.rt.Context@d3b0d3b] com.sap.aii.mappingtool.tf3.MessageMappingException: Runtime exception during processing target field mapping /ns0:MaterialBITMAP_In. 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com.sap.aii.ibrep.sbeans.mapping.MapServiceRemoteObjectImpl0_0p4_Skel.dispatch(MapServiceRemoteObjectImpl0_0p4_Skel.java:146) at com.sap.engine.services.rmi_p4.DispatchImpl._runInternal(DispatchImpl.java:312) at com.sap.engine.services.rmi_p4.DispatchImpl._run(DispatchImpl.java:199) at com.sap.engine.services.rmi_p4.server.P4SessionProcessor.request(P4SessionProcessor.java:129) at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33) at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41) at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37) at java.security.AccessController.doPrivileged(AccessController.java:215) at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100) at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170) Root Cause: com.sap.aii.utilxi.misc.api.BaseRuntimeException: 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11:15:02 End of test
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