On 4.4.2008, at 18:11, Jonathan Prouty wrote:

therion.exe: error -- trip2.th2 [34] -- survey does not exist -- splay.trip2.clay -- station does not exist -- A10C@splay.trip2.clay

Just remove ".clay" from names of points.

Your clay.th file begins with:

survey clay -title "Clay Cave" input trip2.th # survey data input trip2.th2 # scrap data

It means the all the data therion needs are included in survey "clay" so the correct "path" to centerline point is:

A10C@splay.trip2

Martin