How to prevent a stack from loading twice (in Linux)

[Peter Alcibiades]

How to do this?  I have tried to use onreloadStack, just trapping it in the 
stack script, but this seems to do nothing.  Even if the command is to 
close the stack on reloadStack, it opens anyway.

The other one would be relaunch, but it seems to be Win only.

There was a thread and -- was it Richard Gaskin? someone talked about how 
he always did this in the preliminaries to his stack opening.  Can't seem 
to find it.

Peter