Sorry for the late reply steam does not notify me of new discussion topics being created on the workshop. In case this is still an issue getting a new drill mechanoid should solve the problem. If it's not there another mod might be interfering. Try moving my mod near the end of your mod list to ensure it overwrites anything else other mods are trying to change. Maybe some other mod is trying to add a new worktype but replacing the block instead of adding to it.

Hey, I'm having the same issue. I tried destroying the Mech and the drill, I even tried giving the command from dev mode. When I tried to issue the command driectly using Dev mode I got the following error in the log. I'm not sure it has anything to do with your mod, which I do not want to play without, but it seemed like a place to start.

Exception in JobDriver tick for pawn Mech_Tunneler18845 driver=JobDriver_OperateDeepDrill (toilIndex=1) driver.job=(OperateDeepDrill (Job_2700) A=Thing_DeepDrill18846)
System.NullReferenceException: Object reference not set to an instance of an object
at RimWorld.JobDriver_OperateDeepDrill+<>c__DisplayClass1_0.<MakeNewToils>b__1 () [0x0002c] in <2a35adf0a6b2491888068e783d046a45>:0
at Verse.AI.JobDriver.DriverTick () [0x00163] in <2a35adf0a6b2491888068e783d046a45>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) Verse.Log:Verse.Log.Error_Patch1 (string)
(wrapper dynamic-method) Verse.AI.JobUtility:Verse.AI.JobUtility.TryStartErrorRecoverJob_Patch1 (Verse.Pawn,string,System.Exception,Verse.AI.JobDriver)
Verse.AI.JobDriver:DriverTick ()
Verse.AI.Pawn_JobTracker:JobTrackerTick ()
Verse.Pawn:Tick ()
(wrapper dynamic-method) Verse.TickList:Verse.TickList.Tick_Patch2 (Verse.TickList)
(wrapper dynamic-method) Verse.TickManager:Verse.TickManager.DoSingleTick_Patch4 (Verse.TickManager)
Verse.TickManager:TickManagerUpdate ()
Verse.Game:UpdatePlay ()
Verse.Root_Play:Update ()

Seeing this thread again I have to apologise. Let me just say I have yet to play with mechanoids so my knowledge is spotty and mostly what I've heard, seen and found in the game files.

Looking up this issue in the game files I found mining mechanoids cannot use drills to begin with. The drill task itself has the tag <canBeDoneByMechs>false</canBeDoneByMechs>. I added the drill work type to mechanoids because its part of mining and there's no harm in doing so. However I did not change the ability for them to actually use drills. If you want them to be able to use drills then you'll need another mod and I believe there was one on the workshop.

LOL! Thanks so much! I was so confused because in their description it kinda gives conflicting messages, says work activities drilling and mining, but then if you click that it only lists mine and mining. Anyway, I'm really appreciative that you took the time to look into that for us!

No problem I am sorry for the confusion.

You didn't cause the confusion, that description is from the DLC.