So, I raised up one hill on Hoth. One hill. and terrainmunge kept crashing. So I reloaded the stock hoth terrain and it won't even save it. It says it cannot write the terrain file. If it means anything, I've been putting in a flat terrain for when I need to do planning or hintnodes in tunnels. But I've used that forever so idk why it would crash now.
Why me
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AHAHAHAHAHAHA, I decided to look at the stock hoth.ter properties and it was set at READ ONLY! So I unchecked it and it works now. Still doesn't explain why the other was crashing but HA! IN YOUR FACE MOD TOOLS CURSE!
I wish I had your petty ZE glitch curse.. At least you can munge :P
I think zeroeditor generates a *.LLL file in the world folder when opened. If you delete this it might stop the crashing but I'm not sure if it has to do with the .TER file. I would try replicating the same modification after you make sure the entire world folder is set to read-only off.