Maaping Error:Unexpected error while parsing multistructure document.

Hi,

We are getting below error for Idoc to File scenario. It is a standard Idoc and we have configured common ICO for 3 interfaces. It is working fine for 2 interfaces (with single and multiple Idocs) but giving error for the 3rd while testing with single and multiple Idocs.

“MappingException: Unexpected error while parsing the multi-structure document, NullPointerException: while trying to invoke the method javax.xml.stream.XMLEventWriter.add(javax.xml.stream.events.XMLEvent) of a null object loaded from local variable 'writer'”.

*Note: For same IDOC xml test run thorugh message mapping is working fine.

Please guide.

Thanks & Regards,

Nida