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screwy system variables !? [message #6608]

Thu, 25 July 1996 00:00

trujillo
Messages: 2
Registered: July 1996

Junior Member

When I try to compile/run it, I get the following error (unless I
manually define !tester at the command line first):
> % Not a legal system variable: !TESTER.

Now, I change the program to
> pro tester
> defsysv, "!tester", 222
> help, /system_variables ;this line indirectly tells me about !tester
> end

And it compiles and runs fine, and output suggests that the global
variable has been created: "!TESTER = 222". What the heck is
going on? Is this a bug? Why can't I use a system variable I have
just defined later in the same program? I'm using IDL version 4.0.1.
Maybe I should give up and use a more rational language like C/C++!

-Chad

chad@galileo.ifa.hawaii.edu
http://chipotle.ifa.hawaii.edu/~chad/

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