Therion version 5.4.3 and subsequent development versions have broken the functionality whereby coordinates entered with a variety of coordinate systems are converted to a user selected coordinate system for output. The 5.4.2 output attached is from the last installation file I have that gives a correct output (all coordinates start with 159), and the next one, 5.4.3 and all subsequent versions have coordinates some 1000 km apart. It makes it a very long cave, but unfortunately two of the entrances are in the middle of the pacific ocean! The problem is that Therion is assuming that they are all in the chosen output coordinate system, but it is not performing any conversion. No errors are reported (although there are mysterious scale related errors in other datasets that could be as a result of this problem). I am using these coordinate systems for input; cs EPSG:2193 #NZ Transverse Mercator 2000 cs EPSG:27200 #NZ Map Grid 1949 cs lat-long and for output in this case I am using; cs EPSG:2193 #NZ Transverse Mercator 2000 Bruce