In the latest dev version, the game will crash whenever a mechanical arm is moving an item, and then is turned into a contraption using a cart assembler.

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

This issue has been closed since it has been inactive for 3 weeks since it was marked as stale.

I was unable to reproduce this. Could you please post your crash log and a screenshot of your setup?

It might be because I am using a custom mod launcher or that I compiled the latest dev version wrong. But here is my screenshot and crash report
Screenshot:

Latest.log:
latest.log

The error is saying that java.nio.ByteBuffer.position(I)Ljava/nio/ByteBuffer; cant be found, just looked through code and it is there, seems to be issue related to compilation. tocko73, can you recompile and test issue?

The ByteBuffer bug comes up if the code was compiled on Java 9+ but run with Java 8. Try compiling and running the mod with the same version of Java.

ahhh, I think I understand what's going on. I compiled it on openJDK 8, and then sent it to tocko for testing stuff together, and his pc must be running on Java 9+, hence the crash.

wait