Try this...

TRY 
	o=crea("somethingthatdoesnotexist")
CATCH TO oErr
	? "Catch:",oErr.ErrorNo
ENDTRY

>Is there any function like

IsDefined("MyClass")

that tells me if MyClass is defined? I need this function in a loop where the class name is constructed at runtime and, if defined, an object will be instantiated. e.g.
>

>for Loop = 1 to MaxClass
>  NewClass = ConstructClassName(Loop)
>  if IsDefined(NewClass)
>    oObject = CreateObject(NewClass)
>    * do something
>  end
>endfor
>

>
>Thanks