Hello i tried making the portal computer as shown in direwolf 20 video . However everytime i try to run it my turtle keeps gettingmessage books:9: attempt to call nil. I am using 1.0.2 of direwolf20 pack for version 1.7 of minecraft. all perihperals are wrapped to the correct side. any idea what is the problem and how to fix it? on the line 9 in that code its p=getallstack line