Machinegun on tank not firing-12.30

[vortex1967]

I did a search and came up negative. Sorry if it has already been reported.
The tank machine gun doesn't fire at biters, nests or entities when space bar or even c is pressed.
Also biter or nest don't turn green they stay red.
The turret doesn't rotate like it did when you select an entity to fire at.
I'm using 12.30 vanilla that was fresh restart.

[Supercheese]

Did you switch to the machine gun? You have to press the appropriate hotkey (Q by default).

[vortex1967]

Sorry.
Just tried it.
It has been so long since I have started a new game I completely forgot about using Q in the tank.
I always have the tank set to the machinegun.