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Re: Changing common variable definition [message #2561 is a reply to message #2560]

Tue, 26 July 1994 04:52

tai
Messages: 14
Registered: June 1994

Junior Member

Matthew Larkum (larkum@optolab.unibe.ch) wrote:
: common my_vars, x, y
: and then add a variable:
: common my_vars, x, y, z
: and recompile, I get an error:
: % Attemp to extend previously defined common: MY_VARS
: Is there any way to redefine a common variable?

No, your common block definitions must all be the same (ala Fortran).
If you're using IDL version 3.6, you can just do the following:

common my_vars, x, y
...
common my_vars

If you're using an earlier version, my suggestion is to go with an
@include_file.

main program:
@globals.pro
...
@globals.pro

globals.pro:
common my_vars, x, y

Hope this helps.

Alan

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[Message index]

		Re: Changing common variable definition By: thompson on Tue, 26 July 1994 06:42
		Re: Changing common variable definition By: tai on Tue, 26 July 1994 06:35
		Re: Changing common variable definition By: andy on Tue, 26 July 1994 06:20
		Re: Changing common variable definition By: larkum on Tue, 26 July 1994 06:17
		Re: Changing common variable definition By: tai on Tue, 26 July 1994 04:52

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