MATMAS IDocs are failing in 51 Status?

Hi,

I am sending across Material from one SAP System 4.5B Version to SAP System ECC 6.0.

I am using Mass send transaction to send these material (BD10). Here I am giving all the material number and the target system name and send it across in full. Now, the idocs are getting created but on the inbound side they are failing in 51 Status with a error text "<b>Message incomplete (seriousness, area, number, or exception missing)</b>".

Can anyone let me know what could the reason? Is there problem with configuration setting or else problem lies in EDI Setting.

Raghuram.