I'm getting this error on startup:

https://steamcommunity.com/sharedfiles/filedetails/?id=1818760463

I believe it's related to a mod conflict (probably with Bob Logistics) because I have used it without any issue back before I installed Bob's modpack. Also, it appears to be similar to: https://mods.factorio.com/mod/robotMiningSite/discussion/5b6563af949d79000ac5af81

Just tell me if you need a save.

Unfortunately I'm unable to replicate your error.
I'm using Bobs Logistics too, that shouldn't be a problem, in fact, it's an optional dependency.
Could you provide a mod list or save, so I might be able to track down the issue?

Yeah, that's weird.

Actually, Robot Mining Site was one of the very first mods I installed. Soon after, I saw that there was the possibility to use some higher tiers bots with Bob's Logistics enabled and I decided to install it. Can't remember if I installed other mods that time too, but that's when that issue started.

I would provide you with a modlist, but unless there is a way to export it automatically, I'd rather deplete a whole ore field by hand. In the meantime, here is a save: https://drive.google.com/open?id=1cn3ozVya1bZxvrD8WokzjD6U3dv_-JEi

Robot Mining Site is disabled for obvious reasons. Hoping that's enough for you to figure something out.

I'll take a look.
The list of active mods and settings can be fount in the mods folder (same parent as "saves").
It's called "mod-list.json", settings are stored in "mod-settings.dat".

Alright. Thank you for that and the information.

Found something which made this mod unable to load with certain settings of Bob's Logistics set to false.
Can you try again with this file and let me know if this resolves the issue? (just download the zip-file and copy the thing into your factorio/mods folder)

For the record, do you happen to know which ones?

As for the fix… I'm afraid that it didn't solve it.

https://steamcommunity.com/sharedfiles/filedetails/?id=1820041475

Found it.
The error kicked in when the robot parts setting in Bob's Logistics was set false and the upgrades from this mod on true.
This should be fixed now in v9.0.3, please let me know.

It's all fixed indeed. However…

There is no recipe/tech for the upgraded robots. I can access them through an Infinity Chest though.

Have you enabled them in the mod settings menu? They are disabled by default...

Yup.

Enabled: https://steamcommunity.com/sharedfiles/filedetails/?id=1820360785

And here's the tech tree, with everything related to mining/mining robots: https://steamcommunity.com/sharedfiles/filedetails/?id=1820500905

Released version 0.9.3 which now fixes this issue.

6.917 Mods to disable:Failed to load mods: robotMiningSite/data.lua:44: robotMiningSite/prototypes/miningRobot.lua:17: attempt to index global 'miningRobotMK2' (a nil value)
stack traceback:
robotMiningSite/prototypes/miningRobot.lua:17: in main chunk
[C]: in function 'require'
robotMiningSite/data.lua:44: in main chunk
stack traceback:
[C]: in function 'require'
robotMiningSite/data.lua:44: in main chunk

Mods to be disabled:
• robotMiningSite

still wont load

Not related to previous issue, but should be fixed in the new release (0.9.4)