Resolution:
Description: 604 error translates to:
//"error occurred at recursive SQL level %s"
// *Cause:  An error occurred while processing a recursive SQL statement
//         (a statement applying to internal dictionary tables).
// *Action: If the situation described in the next error on the stack
//         can be corrected, do so; otherwise contact Oracle Support.
InConcert clients report DBMS error 604 when running with Oracle.

Restarting the DataBase will probably fix the problem.  If not try setting open_cursors to 255 or above in the init&ltoracle_sid>.ora file and restart the database.  It is less clear how effective changing open_cursors is.

If none of this work then have the customer call Oracle Technical Support.