Before reporting:

Please use the search function to make sure an issue hasn't been reported already. This avoids duplicates.
Also, please give this issue a descriptive name that contains the game version in the title, eg.: "[1.12] Capacitor Interaction Crash"

Description of the issue:

Crash when launching rod from railgun

Crashlog:

https://pastebin.com/AYTPcteH

Versions & Modlist

ImmersiveEngineering-0.12-89 and forge-14.23.5.2815 and mods are in crash report

Also, please try testing an issue in a minimal instance, with just IE, Forge and maybe JEI. That makes elminating compat issues easier.

Lastly (you may delete this from the report itself)

Please, for the love of all that is voxelbased, read the contribution guidelines. They are linked to the right in the message box.
When reporting issues, these are crucial, and the team withholds the right to close an issue for the plain stupidity of not reading and adhering to them.

Thank you for reporting issues, without people reporting them, they wouldn't get fixed. You're helping contribute to this mod and that is much appreciated <3