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System Variable question [message #60192]

Mon, 05 May 2008 11:08

ikevi10
Messages: 4
Registered: May 2008

Junior Member

One more quick question. I have my .pro setup to use a system
variable. I am using the following call: keyword_set(!DATA_TYPE)

Where of course !DATA_TYPE is defined in my idl start file.

It works great, but I would like a way to be able to check that !
DATA_TYPE is created (and if it isn't I can define it with DEFSYSV and
set it to the default 0)

I tried just using keyword_set and that doesn't work correctly. (IE
if I remove the definition of !DATA_TYPE in my startup, when calling
keyword_set instead of returning 0 it gives me: Not a legal system
variable: !DATA_TYPE.)

Thanks for any help

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