XMBMessageHeader.getMessageId() error

Hi,

I have file to proxy scenario; there is a error in receiver proxy communication channel.

SOAP: call failed: java.lang.NullPointerException: while trying to invoke the method com.sap.aii.af.sdk.xi.mo.xmb.XMBMessageHeader.getMessageId() of an object loaded from local variable 'messageHeader'

Message processing failed. Cause: com.sap.engine.interfaces.messaging.api.exception.MessagingException: java.lang.NullPointerException: while trying to invoke the method com.sap.aii.af.sdk.xi.mo.xmb.XMBMessageHeader.getMessageId() of an object loaded from local variable 'messageHeader'

can somebody help me with this.

Thanks.

Prema