Normally, when an API function tries to get an object that doesn't exist or can't be converted to an object, the engine returns SE_NOWHERE. This allows your application to use that object without error checking the result. However, you may instead wish to check all your results for errors and ensure that this object is never used. Turning on this define, which defaults to being off, causes an error if SE_NOWHERE is ever tried to be used.
JSE_INLINES (on, off if JSE_MIN_MEMORY is defined)