isntwill reverse the results.
named-throw (is | isnt) catchable
Tests whether the named catch is active at this point in the program. A catch is active only when it is in a scope that is currently executing.
The named catch can be any of the following:
A compile-time error results if the named catch is not declared within the program.
The following code uses
is catchable to see if there is a currently active catch named empty-recordset before throwing to it: