pipes invisibol

[ItsMeArtur]

Hello guys.

I tryed to download the old tekkit world to yogscast ( http://www.youtube.com/watch?v=P5yZGFuzVxk )

But all the pipes wer invisibol.

Iv tryed to fix this bug for days but i got no idea whats causing it....

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Consol error:

18:10:49 [info] [buildcraft] Error creating pipe type 0 (class=null)

18:10:49 [info] [buildcraft] Error creating pipe type 0 (class=null)

18:10:49 [info] [buildcraft] Error creating pipe type 0 (class=null)

18:10:49 [info] [buildcraft] Error creating pipe type 0 (class=null)

18:10:49 [info] [buildcraft] Error creating pipe type 0 (class=null)

18:10:49 [info] [buildcraft] Error creating pipe type 0 (class=null)

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thats what it spammed at consol idk how to fix it