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Re: Pointers problem - Unable to dereference NULL pointer [message #57311 is a reply to message #57213]

Wed, 05 December 2007 10:00

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Romolo Politi writes:

> I used pointers to share variables between different procedures.
> When I compile the project it's all right. If I export the project
> as .sav there is the error "Unable to dereference NULL pointer".
> Someone just encountred this problem?

My guess would be that the pointer never got filled
with data because the program couldn't find the data
file. You are catching errors, and popping up a dialog
message, right? So you would know if an error occurred
in your program during runtime. The data file will,
unless you are doing something special, have to be
in the same location as the save file.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Pointers problem - Unable to dereference NULL pointer By: David Fanning on Thu, 06 December 2007 07:09
		Re: Pointers problem - Unable to dereference NULL pointer By: Romolo Politi on Thu, 06 December 2007 07:04
		Re: Pointers problem - Unable to dereference NULL pointer By: David Fanning on Thu, 06 December 2007 06:33
		Re: Pointers problem - Unable to dereference NULL pointer By: Romolo Politi on Thu, 06 December 2007 06:23
		Re: Pointers problem - Unable to dereference NULL pointer By: David Fanning on Thu, 06 December 2007 06:17
		Re: Pointers problem - Unable to dereference NULL pointer By: David Fanning on Thu, 06 December 2007 06:10
		Re: Pointers problem - Unable to dereference NULL pointer By: Romolo Politi on Thu, 06 December 2007 05:17
		Re: Pointers problem - Unable to dereference NULL pointer By: David Fanning on Wed, 05 December 2007 10:00

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