Server crash due to buildcraft pipes i think (log include) please help

[neo130288]

ok so my server has bin running sweet until this morning i went to logon and found it was down after many atempts of 'fixing' (by way of replacing files cheacking configs etc etc) i have come to a dead end so heres hoping some one here may be able to shed some light and help me fix this issue.

log:

http://pastebin.com/tj3qzYw4

any help is greatly welcomed

ok found the orignal error in the log here:

http://pastebin.com/5LLU1bTB

[neo130288]

ok so i managed to get the server running again i now get:

"[buildcraft] error creating pipe type 0 (class=null)"

i have deleted all the pipes i can find on my world however i am unsure as there are many players on the server.

also the error happend over 5-6 hours after the last person disconected from the server so i dont realy know what caused the error in the first place

again any help on how to fix this is welcomed