| Re: Compile Problem with IDL5.2 [message #16403 is a reply to message #16331] |
Thu, 22 July 1999 00:00   |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Joerg Mosthaf (joerg.mosthaf@urz.uni-heidelberg.de) writes:
> Well, thanks for answering so fast, but this is probably not the cause of the
> problem, as I can see in the status-windows that all routines, including the
> offending one, are compiled. At least I presume that when IDL says
> % Compiled module: PatData
> that it really did that and compiled the function. But still it sometimes
> cannot find said routine when executing.
> I will try the suggestion in the second posting and report back.
Here is an illustration of what is going on for you.
Here is my program file, called "main.pro"
**********************************************
PRO utility
value = myfunction(5)
END
FUNCTION myfunction, number
RETURN, Randomu(seed, number)
END
PRO main
utility
print, myfunction(3)
END
**********************************************
When I run this program, I get this:
IDL> main
% Compiled module: MAIN.
% Variable is undefined: MYFUNCTION.
% Execution halted at: UTILITY 2 C:\RSI\IDL52\DAVID\main.pro
% MAIN 10 C:\RSI\IDL52\DAVID\main.pro
% $MAIN$
This happens even if I compile the program first:
IDL> .compile main
% Compiled module: UTILITY.
% Compiled module: MYFUNCTION.
% Compiled module: MAIN.
IDL> main
% Variable is undefined: MYFUNCTION.
% Execution halted at: UTILITY 2 C:\RSI\IDL52\DAVID\main.pro
% MAIN 10 C:\RSI\IDL52\DAVID\main.pro
% $MAIN$
The problem here is that the first module, UTILITY, is calling the
function, MYFUNCTION, that isn't compiled until *after* UTILITY is
compiled. As a result, "myfunction" has been registered with IDL
as a variable.
The problem is easily solved (without resorting to FORWARD_FUNCTION) by
moving the function ahead of the UTILITY procedure in the file:
**********************************************
FUNCTION myfunction, number
RETURN, Randomu(seed, number)
END
PRO utility
value = myfunction(5)
END
PRO main
utility
print, myfunction(3)
END
**********************************************
Now, when I call it:
IDL> main
% Compiled module: MAIN.
0.383502 0.653919 0.0668422
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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