The mod The Factory Must Grow (0.4.11) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event TFMG::on_rocket_launch_ordered (ID 133)
TFMG/scripts/story.lua:332: attempt to index local 'ice_worm' (a nil value)
stack traceback:
TFMG/scripts/story.lua:332: in function 'worm_warning'
TFMG/scripts/ice-worm.lua:14: in function 'rocket_launched'
TFMG/scripts/init.lua:132: in function <TFMG/scripts/init.lua:131>

For clarity, I tried launching a rocket back to SELF when it crashes consistently, I assume because I have not seen an ice worm yet :D

Bug fix should be up in a min, let me know if that fixes it

Good thing I had left a save on this, as it had fixed itself a bit later, but yeah, that save works on 2.0.72 build 84292

Great to see such a quick fix, and so far the mod has been great (did need help to do a sqrt, and the solution I have is black magic for me, but the computer solutions are fun to solve, and this mode really forces to make more logic uses to balance things out which is great, in normal factorio you can just fill everuthing up to the brim too often!

Good thing I had left a save on this, as it had fixed itself a bit later, but yeah, that save works on 2.0.72 build 84292

Great to see such a quick fix, and so far the mod has been great (did need help to do a sqrt, and the solution I have is black magic for me, but the computer solutions are fun to solve, and this mode really forces to make more logic uses to balance things out which is great, in normal factorio you can just fill everuthing up to the brim too often!

Glad you're enjoying the mod