Relayed from EnigmaticaModpacks/Enigmatica6#1595 (comment)
See EnigmaticaModpacks/Enigmatica6#1595 (comment) for an idea of what could be the cause

Issue type:

• 🐛 Bug

Short description:

On a dedicated server, setting up a Powah Creative Capacitor -> (Energy Importer -> Logic Cable -> Energy Interface) -> Refined Storage Crafting Grid and then opening the energy importer's GUI crashed my client

Steps to reproduce the problem:

1. On a dedicated server, place down a Powah Creative Capacitor. Adjacent to that, place a Logic Cable. Adjacent to this Logic Cable, place any energy storage device (I used an Integrated Dynamics Energy Battery), and a Refined Storage Controller. Adjacent to the Controller, place a Crafting Grid, so the Controller uses energy.
2. Attach an Energy Importer to the Creative Capacitor, and Energy Interfaces on the Battery and Controller.
3. In the Energy Importer, put a Variable Card in the "Import Energy" function. To speed up the process, change the rate to 10000.
4. Once both energy receivers are full, change the "Import Energy" Round Robin setting to true. This should crash the server.

Expected behaviour:

No crash

Versions:

• This mod: IntegratedTunnels-1.16.5-1.6.17
• Minecraft: 1.16.5
• Forge: 1.16.5-36.0.44

Happens in Enigmatica 6 v0.4.3, looking at the stacktrace this is most likely reproducible with:

• Powah (+lib)
• Refined Storage
• Integrated Tunnels/Dynamics (+lib)

Log file:

2021-03-09-1.log

Other similar Round Robin crash:
2021-03-09-2.log
2021-03-09-1.log

Thanks for reporting!

This seems to be the same problem as CyclopsMC/IntegratedDynamics#999, which has actually been fixed as of ID 1.5.1 (you seem to be using 1.5.0).

Ah my bad, didn't check Integrated Dynamics for duplicates. Thank you!