(1) What is the difference between
insert script of stack "mainstack"
and
start using stack "mainstack"
The difference is subtle. When you "start using" a stack, its stack script is inserted into the hierarchy ahead of the home stack. When you "insert script into back" the script is inserted behind (i.e., after) the home stack.
In standalones, which have no home stack, the mainstack functions as the home stack. So inserting scripts into the back in a standalone will place them after any scripts in your main stack script.
You don't have to insert the script of a mainstack unless you are using separate external stacks. If all your stacks are substacks of a single main stack, they have access to the main stack script automatically.
(2) I added
insert script of stack "mainstack"
to the preOpenStack handler for a stack. But a handler call in the stack caused an error saying it couldn't find the handler. Shouldn't it though?
Normally. But I'm guessing that in preOpenStack, there is not yet a stack available so there are no scripts to insert. Try doing your insertions on openStack instead. But note that unless you are using external stacks rather than substacks, you don't need to insert the script of the main stack.
(3) Do repeated "start using" or "insert script" calls mean anything, or are they like "global" calls that affect all stacks after the call?
Every time you do an "insert" or "start using" command, the script that is inserted moves to the front of any others already in use. So repeated "start using" commands will shuffle scripts already in use to the front of the list. If you have only one script in use or inserted, then repeated calls to "insert" or "start using" don't do anything.
In practice it is unusual to insert scripts that have duplicate handler names, so usually the order of the scripts in use doesn't make any difference.
-- Jacqueline Landman Gay | [EMAIL PROTECTED] HyperActive Software | http://www.hyperactivesw.com
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