ResumeStack message... bug?

Klaus Major klaus at
Tue Nov 13 12:57:48 EST 2007

Hi Jaqueline, hi Mark,

> On Nov 12, 2007, at 8:00 PM, J. Landman Gay wrote:
>> Mark Swindell wrote:
>>> At the stack level of each of the sub stacks place this script:
>>> on resumeStack
>>> go stack "AAA"
>>> put "hello"&return after field 1   end resumeStack
>>> Now, toggle back and forth, slowly, between the two substack  
>>> windows so that each alternately comes to the front.
>>> What I experience (and another list member confirmed) is this:
>>> On the first two toggles a  resumestack message is sent and  
>>> "hello" appears in field 1 of stack "AAA".
>>> On the next two toggles a resumeStack message appears NOT to be  
>>> sent and no "hello" appears.
>>> Then two more "hellos"
>>> Then two "no hellos."
>> I can't quite work out the repercussions entirely, but I think the  
>> problem may be due to nested resumeStack messages. The script is  
>> opening another stack during its own resumeStack handler, which  
>> will trigger the same message in the newly-opened stack. Since that  
>> one also has a resumeStack handler with a "go" in it, I think you  
>> are getting some kind of recursion as the two bounce back and forth.
> Thank you for the suggestion.
> There is no go command in the stack that is being visited, only in  
> the two substacks that call the visit to the third (the main  
> stack).     But yes, it seems there could be some kind of  
> recursion.  I just don't know why or where, or why it only happens  
> alternately, and then functions as it should.
>> Try locking messages before issuing the "go" command to see if that  
>> helps.
> Unfortunately lock messages has no effect.  ????

I have the feeling that "resume-/suspendstack" is not send reliably.

I have routines that change the menus/menubarbar(s) of my stacks  
dynamically (maybe you remember my problem, Jaque)
and sometimes this simply does not work, but I still did not find any  
recipe/legality for this phenomenon.


Klaus Major
klaus at

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