Detecting and handling error messages?
- To: mathgroup at smc.vnet.net
- Subject: [mg24235] Detecting and handling error messages?
- From: AES <siegman at stanford.edu>
- Date: Mon, 3 Jul 2000 20:39:17 -0400 (EDT)
- Organization: Stanford University
- Sender: owner-wri-mathgroup at wolfram.com
What I'm really after is a simple way of detecting (testing) if errors
have occurred during the execution of a given Input cell, so I can note
this and maybe do something, but without actually having the error
messages be printed to the screen.
I note that The Mathematica Book on p. 1155 says
Off[symbol::tag] switches off a message, SO THAT IT IS NO
LONGER PRINTED (emphasis mine)
Page 460 says
$MessageList a list of the messages PRODUCED during
a particular computation
Note: "produced", not "printed" -- ??
Page 1249 says
$MessageList is a global variable that gives a list of the
names of messages GENERATED during the evaluation of
the current input line
"Generated" ?=? "produced" ?=? "printed".
Anyway, as best I can tell by trial and error, messages that have been
Off[ ]'ed do not appear in $MessageList, and Check[ ] explicitly doesn't
test for Off[ ]'ed messages. So is there a way to test if the
associated errors have or have not occurred?
Thanks siegman at stanford.edu
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