Problem in File to Idoc scenario

Hi,

I have a file to Idoc scenario.The occurance of the Idoc is 1. I want multiple Idocs to be generated for a particular repetitive element in file. Therefore i created a ED and imported it. Now I'm getting an error in monitor.

- http://sap.com/xi/XI/Message/30" xmlns:SOAP=" http://schemas.xmlsoap.org/soap/envelope/" SOAP:mustUnderstand="">

<SAP:Category>XIAdapter</SAP:Category>

<SAP:Code area="IDOC_ADAPTER">ATTRIBUTE_HEAD_MAPPING</SAP:Code>

<SAP:P1>||</SAP:P1>

<SAP:P2>T64_BPM</SAP:P2>

<SAP:P3>||</SAP:P3>

<SAP:P4>HORIZONISU</SAP:P4>

<SAP:AdditionalText />

<SAP:ApplicationFaultMessage namespace="" />

<SAP:Stack>No partner conversion found</SAP:Stack>

<SAP:Retry>M</SAP:Retry>

</SAP:Error>

what wud be the problem?

Regards,

Malini