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1.120.9 Object: error raising

doesNotUnderstand: aMessage
Called by the system when a selector was not found. message is a Message containing information on the receiver


error: message
Display a walkback for the receiver, with the given error message. Signal an `Error' exception (you can trap it the old way too, with `ExError'


halt: message
Display a walkback for the receiver, with the given error message. Signal an `Halt' exception (you can trap it the old way too, with `ExHalt')