I'm trying to migrate a FTB beta A server (Minecraft 1.4.2) with AdditionalPipes-2.1.3u17 installed to Minecraft 1.4.6, with the latest AdditionalPipes-2.1.3u40-1.4.6 release.

The crash log: http://pastebin.com/pJxjhkU3

The config for 1.4.2: http://pastebin.com/RbXjXH5y

The config for 1.4.6: http://pastebin.com/gKJJG62j

I tried to change the ID's in the 1.4.6 config, but it didn't help. Well at least for that scenario, the world didn't crash while trying to load.

Do you have any advice to get around this issue (which may be my system/world)?

Thanks

Closing since cause is unknown, and seems to be one-off.