Hi, Bruce

Fixed@cave is a nonexistent station (nor defined nor fixed). Therion is right with warning but it is exactly what I need. I'm try to define station in upper namespace for link to it from other places. It is worked proper but throw a warning...

After the experiments I found a workaround. This code removes warning but it a bit verbose and not obvious...

survey cave
  centerline
    data nosurvey from to
    Fixed [email protected]
    equate Fixed [email protected]
  endcenterline
endsurvey


02.08.2017 02:53, Bruce Mutton via Therion пишет:
So, to clarify my understanding of your example.
Fixed@cave = is for example a gps coordinate, defined elsewhere with a fix 
statement.
[email protected]  = is a survey station that is defined in a survey, for 
that same location.
[email protected]  = is another survey station that is defined in, 
perhaps, some other survey.
All three stations represent exactly the same physical location.

--
  WBR, Vasily

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