Please help with computercraft mob spawner (mfr)

Hello, due to my inexperience with computercraft I an unable to get this program demonstrated in this video:https://www.youtube.com/watch?v=cPGYSG19Y2U to work.

I keep getting the error on line 19 "attempt to index ? (a nil value)"
Any help would be much appreciated, thanks.

pastebin code for the turtle:bBBxyeV5
pastebin code for the main computer:eqVEnu2H

Do you have a chest immediately behind the computer? What version of CC are you using? What version of OpenPeripherals are you using?

Lyqyd, on 22 November 2014 - 09:03 AM said:

Do you have a chest immediately behind the computer? What version of CC are you using? What version of OpenPeripherals are you using?

I have the chest immediately behind the turtle with the correct orrientation of east/west. The computercraft version I am using is 1.65, and OpenPeripheralCore version 0.5.0 and OpenPeripheralAddons 0.2.0.

lordofttude, on 22 November 2014 - 10:10 AM said:

Lyqyd, on 22 November 2014 - 09:03 AM said:

Do you have a chest immediately behind the computer? What version of CC are you using? What version of OpenPeripherals are you using?

I have the chest immediately behind the turtle with the correct orrientation of east/west. The computercraft version I am using is 1.65, and OpenPeripheralCore version 0.5.0 and OpenPeripheralAddons 0.2.0.

Thanks very much for responding but I acually figured it out now, here is the updated pastebin if you are interested:B1ZHTthj

If you run this on the turtle, what output do you get? Type it in directly, don't use the Lua prompt:

openp/docs back