Ooops ! Just realized that I made a mistake in the code
sent with my previous post...
The explanations were OK, but the following should work
better :
on openstack
global stackA
if stackA is not empty then
--prompt error message
set lockmessages to true
-- exit stack
else
put 1 into stackA
end if
...
on closestack
global stackA
put "" into stackA
...
Again sorry.
JB
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