So it seems my Therion v13Mar2017 beta version issues can be summarised as;

• Loch right-click untrapped errors
• An error to do with ‘symbol-show point cave-station:fixed’
• Survex Loop closure consistently causing untrapped errors
• A single th-config where Therion not able to delete a temporary folder, corrupting log files

I am using ‘loop-closure survex’ (except as noted) with Survex 1.2.27 and Windows 10.

In a bit more detail, and recapping a bit on what I have posted previously;

• Therion v5.3.16 and ‘5.3.16 Vlad’s beta’ always work as expected, in all respects.

• Loch v13Mar2017 beta works OK, except always crashes if I right-click to view the context menu (Loch v5.3.16is always just fine).

• For Therion v13Mar2017 beta version, both loop-closure survex and loop-closure therion:  I have only one th-config file (of 15 in 10 projects tested so far) where everything compiles OK, and I get list.html, pdf, lox and 3d outputs, but the log file has but one line;

warning -- error deleting temporary directory -- C:\Users\Bruce\AppData\Local\Temp\th10044

• For Therion v13Mar2017 beta version, only loop-closure survex tested: Crashes almost immediately while reading file, complaining about ‘symbol-show point cave-station:fixed’ as per attached log file.  I’m guessing this unrelated to the loop closure method used.

./LayoutMapThisCave.thc [54] -- unknown symbol specification -- point cave-station:fixed

writing xtherion file ... done

• Therion v13Mar2017 beta version crashes (similar to the image above) when there are two or more loops present, unless ‘loop-closure therion’ is explicitly set in therion.ini.  Tested on projects with zero, 1, 2 and up to 107 loops.  This seems a pretty reliable hypothesis, but I want to test a few more projects with 1, 2 and 3 loops to be sure.

Bruce