ebxml C1OnRamp error

Hi,
I am getting the below error for perfect commerce. I am receiving the xcbl doc successfully on my side but my reciever is getting this error. It would highly appreciated if someone can help me understand what this error means.

Failed to transmit envelope id = xxxxxxxxxx: com.commerceone.xdk.excp.metadox.factory.EnvelopeInvariantException: No message format

Thanks
Srinivas