As requested. I have tried the Windows build of Therion 5.3.8 and the problem that I had has vanished. the whole cave now compiles including the survex 3d file imported bit.
Thanks Graham
As requested. I have tried the Windows build of Therion 5.3.8 and the problem that I had has vanished. the whole cave now compiles including the survex 3d file imported bit.
Thanks Graham