So it looks like the problem is reproducable with only TiC, but the weird thing is that doesn't happen on a fresh new world, with the exact same tool, with the exact same modifiers. About the error, it's not an error that is caused by the game itself. It is caused by the Tool ...
Added modifier priority command, to list all modifiers, the hooks they implement, and their priority value. Useful for ensuring hooks run in the right order. Moved modifier usage command from /tconstruct modifier_usage to /tconstruct report modifier_usage. Partly for organization, partly to make...