Puzzling lack of debugging information

[Graham Samuel]

This is about a problem I've had before and which I think may even  
have been discussed on the list, but I can't find the reference.

I'm developing an app that has a start-up sequence where parameters  
are set etc: this takes place in the mainstack and one of its cards,  
and while testing using the RR IDE, I set it going by opening the  
mainstack, then typing

    send "startup" to this stack

in the message box (of course "startup" gets sent automatically in  
the corresponding standalone).

This works beautifully if there are no errors in the setup sequence,  
i.e. the scripts in the mainstack and some of its cards, and if there  
is an error later on in running the app, the debugger opens normally.  
However if there is an error during this initialisation sequence, the  
debugger doesn't start up and I don't see the script error window.  
Instead I get a comment in the message box

   Message execution error:
   Error description: Chunk: can't find background

(or whatever the error might be)

with no context information at all. I'm puzzled about why this  
happens (how does the IDE 'know' that I'm running my initialisation  
script rather than any subsequent script?) and I'd like to know if  
there's anything I can do to get more information.

TIA

Graham


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Graham Samuel / The Living Fossil Co. / UK and France