Factorio Headless Server - Unimplemented Opcode (EA) 66 0F 3A 22 D8 03 49 8D 40 03 66 0F 7F 5C 24 I am trying to run a headless factorio server on ubuntu 20.04 but it crashed on an unimplemented opcode. Compiled box64 using https://github.com/ptitSeb/box64/commit/e10a78d67112b10806825732f4122d8ade9e6b4e Dynarec is enabled. 3999|0x1ee5843: Unimplemented Opcode (EA) 66 0F 3A 22 D8 03 49 8D 40 03 66 0F 7F 5C 24 Stop waiting for remaining thread 4002 Stop waiting for remaining thread 4003 Stop waiting for remaining thread 4010 Stop waiting for remaining thread 4011 Stop waiting for remaining thread 4012 Stop waiting for remaining thread 4014 Stop waiting for remaining thread 4015 4003|SIGSEGV @0x648ffeac (???(/usr/local/bin/box64/0x648ffeac)) (x64pc=0xa4a4f033/???:"???", rsp=0xffff7da1bb38, stack=0xffff7d81d000:0xffff7da1d000 own=0xffff7d81d000 fp=0xa6354f80), for accessing 0x48 (code=1/prot=0), db=(nil)((nil):(nil)/(nil):(nil)/???:clean, hash:0/0) handler=0xd7d6c0 4011|Double SIGSEGV (code=1, pc=0x648ffeac, addr=0x48)! 4010|Double SIGSEGV (code=1, pc=0x648ffeac, addr=0x48)! Full server log [factorio-current.log](https://github.com/ptitSeb/box64/files/7079220/factorio-current.log) Edit: It seems to be working properly now after I reinstalled the server files. I have no idea why it didn't work before.