PowerExchange found a row that has a null flag set for the specified foreign key column. The null flag prevents PowerExchange from determining the correct parent for the record. Any orphaned rows that result from the foreign key join cannot be discarded.
Processing ends.
To resolve the problem, take the following actions:
Ensure that the foreign key column is correctly mapped in the workflow.
Ensure that the source and target data maps are either the same or compatible with each other.
Ensure that the parent record name in the source data map is the same as the corresponding record name in the target data map.