Event Map

First step to apply for BAM is event map.
I do get unassociated event map after running the process
But when I try mapping that event for dimensions and facts, following exception is thrown:

[POP.001.0002] A “electric.util.WrappedException” occurred with the Message “SOAPException( Server: [processName] cannot be null )”

I feel that the drop down( for process names) on the “add event map” page is not getting populated, may be due to MwS server issue or database issue

Suggest me the way out so that I can complete my assignment