PLS-00233

Error: PLS-00233: function name used as an exception name in when clause

Causa: The WHEN clause in an exception handler contains a function call instead of an exception name. A valid exception handler consists of a WHEN clause, which must specify an exception, followed by a sequence of statements to be executed when that exception is raised.

Acción: Check the spelling of the identifier in the WHEN clause, then replace the function call with an exception name.