SAP Message AQ639 - More than 16 tables cannot be processed here

Diagnosis
You attempted to bring in more than 16 tables into the join definition.
This is currently not possible.

Procedure
Check whether the combination of this data is not available in fewertables.
Take into account the possibility of database views or logicaldatabases.
Consider, where necessary, the creation of a database view for thecombination of several tables and use of this view in the ABAB Join.