I have placed FSM(*)=true in my run file, but I get the same numbers from
prior to the FSM command.  How do I correctly apply a FSM to my model and
check that it is working?

Since the default FSM method is TRUE, your FSM(*)=TRUE had no effect; i.e. it
merely set the mode to what it already was.  The TRUE method is simply to use
the actual FSM for the present surface in the tank.
The way to examine the FSM in a tank is to use the STATUS command with the
/FSM switch:

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