Tutorial B5-2 Breaking DES

I think the wiki may be outdated on this. I don’t see a way to set the key length to 8 bytes in the gui and I seem to be getting an error if I try and truncate the key down to 8 bytes.
AttributeError: ‘AcqKeyTextPattern_Basic’ object has no attribute ‘key’
Because I don’t know how to do this I didn’t want to issue a ticket because it’s highly possible I am missing something.

It only shows up if you select the Simple Serial target module.