[gmx-users] make_ndx "one of your groups is not ascending"

[Alan Dodd]

I'm having trouble with using make_ndx with a specific file.  Whenever I try to combine or use a specific group (group content at bottom) I get the error "One of your groups is not ascending", and the group is not actually included in the subsequent group produced.  As far as I can see, the numbers in the group are in ascending order (as it ought to be, the group was generated by make_ndx in a previous step).  So can anyone explain what the error is trying to tell me?
The process has been used many times with other simulations, it's just this one that seems to be rickety.


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