Limiting open bets

Hi
In the attached trigger can anybody tell me why the counter with
user variable nu_b and the condition selections trigger expression
nu_b is equal or less than 5 is not working?
I am trying to add one to the variable nu_b for every bet placed and then
when a position is 'greened up' take one away from nu_b.
Thus ensuring that the number of bets with open positions is limited to the
number set in the condition.
Thanks
Mike

Hi
The program has bet count variables, matched, ummatched, back, lay etc.

why not use in the betting trigger:
and selections trigger expression allbets_bm_num-allbets_lm_num is equal or less than 5

in answer your original question I thought you wanted no more than 5 bets per market, but I can see from your trigger it is only one back and one lay.
If you still want to use a counter, I think you need to set it to zero one time only and then update it globally, but the above is much more efficient.