$NewMessage

$NewMessage
is a global variable that, if set, is applied to the symbol name and tag of messages that are requested but have not yet been defined.

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Basic Examples  (1)Basic Examples  (1)

A typical value for $NewMessage is a function that searches for messages in file. Note that this value for $NewMessage will also be applied to internal requests for messages and so may result in additional output:

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If a message has not previously been generated, the value of $NewMessage is applied and evaluated:

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Restore the default value of $NewMessage:

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Introduced in 1991
(2.0)
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