The ME formation plane and ME fluid formation plane are not working.
I have supplied them with channels, I have blocks and fluid in my network, I have blocks and fluids entering my network, I have configured them so that they place certain blocks and fluids, I have power, they have higher priority than everything else, and everything is on the same network, but they’re not working.
I tried using formation planes in both my survival world and a creative test world, and they didn’t work in my first ME system setup in the creative world, nor did they work in my survival world, but when I created a _second_, separate, ME system setup, it worked, but going back to my first setup, it doesn’t work. In my creative test world—the same world, mind you—I have one setup where the block and fluid formation planes aren’t working whatsoever and another identical setup where they _are_ working.
I then tried making a _third_ ME network, replacing the first network I made in my test world, and _this_ time, the _block_ formation plane works just fine but _not_ the fluid formation plane. I am really confused. This is one of the strangest bugs I’ve encountered in any mod.
And yes, I do have blocks and fluids entering the network rather than simply sitting in the network.
I’ve asked others to try it out, and they can’t get the formation planes to work either.
The expected behaviour is for the ME formation plane to place the block it’s configured to place and for the ME fluid formation plane to place the fluid it’s configured to place.
Environment



In my modpack it is working, maybe there is issue with one of AE2 addons in your modpack, or maybe you have incorrect setup. Try to set up maximum priority in formation plane and add some fluid(or items) into the network. Or you can just try to reproduce this in subnetwork. If planes still not working, then problem is caused by one of addons in your modpack. My setup:
Fluid Formation Plane:

Item formation plane:

Tested with:
Minecraft: 1.12.2
Forge: 1.12.2 - 14.23.5.2825
AE2: RV6 - Stable
Modpack: Self-built modpack ( 16 mods )
Also cannot reproduce. I would recommend reporting it to the modpack itself, they might use some protection mods to prevent spawning items/fluids or similar.
In my modpack it is working, maybe there is issue with one of AE2 addons in your modpack, or maybe you have incorrect setup. Try to set up maximum priority in formation plane and add some fluid(or items) into the network.
I didn’t have an incorrect setup, I did set maximum priority in the formation planes, and I did add fluids and blocks into my network.
Because you two cannot reproduce, and because the people I got to test this out also played the same modpack as I do, it’s probably a problem with the modpack. I have no idea what could possibly be causing this, though.
I have the same problem, only tried with Fluid Formation and Annihilation Planes, both didn't work. Playing on Project Ozone 3 Version: 3.0.38
Minecraft Version: 1.12.2
(modded) forge-14.23.5.2808
Just like Enigmatica 2 (the pack I’m playing), Project Ozone 3, too, has the Applied Energistics 2 add-ons AE2 Stuff and ExtraCells2, so it _could_ be one of those mods causing this.
Not sure if this is important info, but I thought mine wasn't working, when in reality it was only functioning when new items entered the system -- not from the items just being available in the ME system.
Not working currently on Glacial Awakening for 1.12.2
Playing Departed3, which does have AE2 Stuff and ExtraCells2. I've tried to create several different valid systems that would import fluids into an ME chest, ME drives, and just as @tylerwiegand said, it will not place fluids into the world from those storage locations, only when a new bucket has entered the system and moves directly to the fluid formation plane.
Again, nothing in the storage drives is being placed by the fluid formation plane.
Most helpful comment
Not sure if this is important info, but I thought mine wasn't working, when in reality it was only functioning when new items entered the system -- not from the items just being available in the ME system.