Hi,
Here is the Error code
"
Error while applying migration: Dp77's FactorioPlus: Machines: Dp77s-FactorioPlus-Machines_1.4.0.lua

...hines__/migrations/Dp77s-FactorioPlus-Machines_1.4.0.lua:5: attempt to index field 'advanced-mining' (a nil value)
"
I'm not sure what to do :)

Probably you don't have FactorioPlus Mining installed.
_DiegoPro77

And that's a migration for the mining drills added from that mod ('cause originally Fp machines and mining where the same mod, but i've been constricted to divide them 'cause it was too heavy for the mod page), so i need to delete that migration if you want to play Fp machines without Fp mining.

Thank you for your post.

I had, indeed, read twice that you have to separate Mining and Machines because of upload size, and indeed i forgot to add mining (after adding all you other mods ^^), so sorry for my stupid mistake. Also, it didn't work while loading a existing save, when i started a new game it worked perfectly. Thanks for your fast reply and your addition to this beautiful game, and keep up the very good work :)

Thank you for the info and the appreciations: you're not "stupid", it happens when you have to manage many mods.
And now, thanks to your appeal, Fp machines can be ran without Fp mining.
_DiegoPro77

Good enjoying with my mods.

Thanks a lot !

Hi, Not Sure What Happened,

Here Is Error Code:

Failed To Load Mods: Error In assignID, Item With Name 'case' Does Not Exist

Source: alassember1 (recipe).

Maybe you've not installed my Fp refining mod or don't have the latest version.
Please be sure to install all the modpack for avoid problems like this.
_DiegoPro77