Editors Note: Used to check for other UNIDs and to see if other extensions are also loaded.
You may still need to wrap it in iserror, but you *CANNOT* use the entity. You have to use the raw numerical UNID.
Functions Documentation
View Function Edit Function
Name iserror
Syntax (iserror expression)
Argument List expression: The expression that you want run and see if it is an error.
Returns conditional: True if it does contain an error, Nil otherwise.
Category error
Description Returns if the expression evaluated to an error or not.
(iserror (divide 10 0))

Returns True.
Comment Not as useful as would first seem due to many errors giving you a hard crash and the fact you can't raise your own errors.