What is this error ?

[alarmap...@gmail.com]

Traceback (most recent call last):

  File "alarm.py", line 200, in <module>

    main()

  File "alarm.py", line 182, in main

    BuildGPIOList()

  File "alarm.py", line 66, in BuildGPIOList

    GPIO.setup(GPIOList[i], GPIO.IN)

ValueError: The channel sent is invalid on a Raspberry Pi

[Gadjet Nut]

It means the pin number is out of range. For Raspberry Pi A and B valid ranges are 1-26 and on the A++ and B++ valid range is 1-40. 

Someone else has the same problem yesterday on a B++ and fixed it by using a pin between 1-26, but you should be able to use all 40 pins with Python on a Rpi A or B ++. 

See this Raspbery Pi forum thread:

http://www.raspberrypi.org/forums/viewtopic.php?f=32&t=85503

You are most likely using an out dated GPIO library and need to update:

sudo apt-get update
sudo apt-get upgrade