Hello cconley,
I searched our website and was able to find the following KnowledgeBase article in regards to the error you are seeing. Although it specifically references the SCXI 15xx module, I believe that the same information applies to the 1140 module.
http://digital.ni.com/public.nsf/websearch/91C7DE7A2C2C9AC586256A0A001D8B5D?OpenDocument
Take care,
E.Lee
Eric
DE For Life!