I updated to latest BC 6.2.4 on my server. Loaded chunk where I have my BC Lasers and got the following server crash. My lasers are connected to EnderIO energy conduits by the way, if that matters.

http://pastebin.com/qDs3p3Sj

UPDATE: nothing to do with EnderIO Energy Conduits. I tried placing the laser in creative mode in single player, and I got the same result. Crashed me to desktop.

I tried installing BCA but BCA gave me another problem related to https://github.com/AEnterprise/Buildcraft-Additions/issues/143. Couldn't get any worlds to load successfully, new or existing. I'm telling my players not to use any lasers at the moment. Thanks!

@jermangarc copy BC 6.2's buildcraft/api to BCA 1.8.1 JAR as a last resort, might help

to fix BCA dissable the dusts in the configs, you got AOBD installed i see so BCA will use those instead if its dusts are dissabled

that or use the latest jenkins build

It's probably either Binnie's mods or Thaumic Tinkeres that are shipping old BC API.

you have Buildcraft Additions 1.8.1 installed, that still has an old BC api, update it to 1.8.2

Ahhh! Perfect I will try that later today. Thanks so much!