Standalone IDL applications?

[Michael Cugley <mjcugley(at)tigger.medschool.dundee.ac.uk>]

I'm developing an IDL GUI application; it's pretty much finished, I'd
just like to turn it into a standalone application, mainly so my
supervisor can play with it without taking up IDL licences.

I've followed the instructions in the hyperhelp, using IDLDE,
compiling the project to a save file, and saving the runtime bits when
asked.  The thing starts up as expected, but there's a problem.  The
application is an image analysis one, and I can't seem to load in any
images.  The DIALOGUE_READ_IMAGE comes up, and I can pick the image
and all (and a thumbnail appears), but then the application itself
doesn't actually recieve the image.  No error messages.

Should this be important, it's IDL Version 5.3 on Sun Sparc Solaris.

Is this a licencing thing?  Has anyone else had any experience in this
area?  
-- 
Michael Cugley (mjcugley@medphys.dundee.ac.uk)