Contents (package MULK.OBJECTIVE-CL)
Condition Class MESSAGE-NOT-UNDERSTOOD
The runtime is unable to retrieve the signature of a method.
A condition of type message-not-understood is signalled when an attempt is made to call a method on an object that knows nothing of it and can therefore not provide signature information for the method. This is most often the case when an object is used at a place that expects an object of a different Objective-C type (that is, it can be regarded as a kind of type error), although it can also happen when a typo is made in the message name part of a method invocation and a no-such-selector error is not signalled.