XI_J2EE_ADAPTER_XI_HANDLER System Error

Hi Friends,

I am working on file to idoc and idoc to file scenario,

we are facing problem in reading files to SAP(Inbound), we dont have any such in sending out from SAP.

all inbound messages in message monitoring are showing as system error in adapter engine with error category as XI_J2EE_ADAPTER_XI_HANDLER .

Can anyone tell what could be problem.

Regards,

Suman