Here is the error msg:
The mod Bigger Artillery (0.7.6) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event alexx-bigger-artillery::on_tick (ID 0)
LuaEntity::active is read only.
stack traceback:
[C]: in function 'newindex'
__alexx-bigger-artillery/control/bertha.lua:46: in function <alexx-bigger-artillery/control/bertha.lua:36>
Factorio starts fine. But this error happens when I load a shell into the turret.
At that time, I was using an arty mod but I later tested with a straight vanilla arty shell (no mods for type or for stacking) and got the same error.