GregTech CEu Version

v2.4.1-beta

Modpack Used

NomiFactory CEu v1.4.1a

Addons Installed

No response

Environment

Forge Server

New Worlds

Unsure

Cross-Mod Interaction

Unsure

Expected Behavior

Two conveyor belts extract silicon and sulfur from drawers into a pipe that outputs into an ender chest. A robot arm is attached to the output to make sure the ender chest always has 64 silicon and 64 sulfur inside.

Actual Behavior

After some time, or perhaps a server reboot, the pipe stops working and starts throws out null errors in server logs.
[12:57:54] [Server thread/ERROR] [GregTech]: First PipeTile is null during walk at MutableBlockPos{x=-9, y=81, z=-25}

Steps to Reproduce

1. Attach 2 conveyor belts to the same pipe which extract from 2 separate drawers, one containing silicon, and the other containing sulfur.
2. Attach a robot arm on another side which outputs to an ender chest. The robot arm is configured to "Keep Exact" and an item filter with 64 sulfur and 64 silicon in the first two slots.
3. Finally, restart the server.

Additional Information

No response

This is a known issue. It can happen in various other configurations, but its not consistent. I already spend several hours trying to figure out the issue, but failed. It should be impossible to happen, but it does.