Machines in certain positions in world cannot receive energy

[ColdFusionH3]

I'm experiencing a very odd issue that I'm at a loss to explain.

There are certain positions in world that I cannot push energy into. I've tried different machines in these positions and ensured the energy input face is correctly configured where appropriate.

For example, the machines marked with red X's below are unable to receive energy. They're on the same SFM cable line as those next to them. The positions aren't consistent along an axis in-world either:

I've tried replacing the program on the disk, the controller itself, different labels, different machines, rebuilding the cable network, restarting Minecraft, exporting energy to every possible side for that machine. No matter what I try, I cannot push energy into those machines at that specific position in-world.

The machines will happily accept energy from other sources to the same side I'm trying to push energy with SFM (e.g. flux points from Flux Networks)

If I move that same machine to the block below and to the front of the cable for example, it works perfectly fine (once I apply the correct labels of course). This shows it's not the machine but rather that specific position in-world that's not working.

I'm using the most up-to-date version of SFM for my game version (SFM v4.34.0 for Minecraft 1.21.1, Neoforge).

[TeamDman]

You mentioned replacing the manager, have you tried the manager being in a different position? My thoughts for diagnosing would be that if you place a new manager somewhere and only label one of the failing positions, if the new manager also fails to deliver, then you could look at the trace logs in that manager. If you look at trace logs for the manager with many things labelled like the original manager, it may crash due to how large the text output would be.

One possible reason might be that the failing blocks come after the succeeding blocks in iteration order. If you are feeding 1000FE to each machine each tick and you are only making 3000FE then all machines after the third would be starved. Iteration order of blocks is undefined behaviour at this time but it may be consistent and causing this problem. You could try "OUTPUT RETAIN 1000 fe:: TO EACH machine TOP SIDE" to avoid over-filling any machine in a way that starves others

[ColdFusionH3]

Thanks for the suggestion!

I tried a new controller in a different position (+/- 1 on the y/z axes), essentially one block below and to the left. Same code copy and pasted, newly placed labels - and the previously failing machines are now receiving power.

I haven't tested every possible position yet, there's a lot and will take a while, but seems it may have fixed the issue.

I don't understand why though. I'm definitely producing enough power - machines are not actively using power, drawing from multiple sides of a Mekanism energy cube, plenty of throughput. Needs further testing Bbt at this stage changing the controller position appears to have helped.

[TeamDman]

Moving the manager despite everything else being the same may have changed the iteration order of the blocks or something. There may be a bug where blocks at like 999/1000 FE are causing some rounding math in unit conversions between megajoules to forge energy to think that there's no more work to be done but I haven't had time to investigate that yet

[jateuu]

I was running to this same problem with latest version and the only workaround i found was with

EVERY 1 TICKS DO
INPUT fe:: FROM cube TOP SIDE
OUTPUT fe:: TO device ROUND ROBIN BY BLOCK TOP SIDE
END

This happened with HNN devices and productive bee's centrifuges so far and with productive bees it only took 3 heated centrifuges for 1 of them to not receive power.