Thanks a lot Bruce for finding this issue.

That makes perfect sense. I was hoping Therion would do the same.  In my
> mind there is little conceptual difference between closing a loop on a pair
> of fixed stations and a pair of stations attached to survey legs.
>

I will try to modify therion to behave same way as survex does. It makes
sense to me, I was just not thinking about this situation.

I also need to chceck, why therion does not report this situation as a
loop. I will let you know.

Best regards, S.
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