Oracle Message PCB-00216 - OCCURS ASCENDING/DESCENDING clause not allowed for string

ERROROCCURS ASCENDING/DESCENDING clause not allowed for string
CAUSEA variable declared with an OCCURS clause with the ASCENDING or DESCENDING KEY IS subclause was used in a SQL statement or embedded PL/SQL block.
ACTIONRemove the ASCENDING or DESCENDING KEY IS subclause from the variable declaration.