Hi List Is there an option to exclude some parts of a line in a XVI export? It also should be exluded from all calculations of course as it is dupclicated survey. I couldn't find something for this in the Therion book. E.g. with using flags for groups of data or anything else? I would like to prevent using comments for all obsolete data to do this job. I had to resurvey a part of a line (not complete line). Therefore I want to export let's say station 0 to 5 from line A, then station 0 to 10 from line B and eventually station 15-18 from line A. (station 0@lineB mailto:0@lineB = 5@lineA mailto:5@lineA and 10@lineB mailto:10@lineB = 15@lineA mailto:15@lineA ) Aim is to exclude a part from line A in the XVI export and not to be confused by obselete stations and shots. "Flags splay" is good for excluding the data from calculations. But which command is suitable for excluding parts of data in the XVI export? Or is this not possible at all? Thanks. Torsten