XML parsing failed because ""

This was one strange i struggled a lot to fix.

I was trying to upgrade a SOA 10g project to SOA 11g

It was having multiple adapters.

I fixed all the adapter but whenever i was trying to compile the process it was giving me this error XML parsing failed because ""



The reason for this issue was that there were multiple entry for the same namespace with different prefix.

I remove the duplicate namespace definition in the composite and i was able to compile it successfully.