Error while Importing data using DMF

I am getting this error while importing data from the CSV file through DMF

Could not process the lookupRecord value on the Args instance. The table ‘DMFDefinitionGroupExecution’ does not exist as a root FormDataSource for the form ‘DMFStagingLogDetails’.

I am on AX 2012 R3!

Is this a bug which requires a hotfix?

The Issue was with the Data files. There was no proper mapping (Some previously mapped columns in the Data Source were missing)