Error& Occurs when one of the Line is created which cannot be posted. This could be due to the fact that either any of the Segment is disabled or End Dates in that case you need to enable the Segment and a/c combination and post the journal.
Also this error occurs when Joournal gets created with no Journal Line, this happens when the System Tries to Create MassAllocation , Reval Journals and the CrossVal Rules does not support the Combination to be created. For Such case youhave to delete the journal and correct the source.
Regards
Vidya