I want to make sure that the data file and the llb file are in the same directory the way you had them, but I'm not sure how to do that or even how to check that they are.
I have a directory on my PC for all the stuff I download from this site. so, I had your stuff in C:\NIweb\Keithley Data File. The llb was there, the data file was there, and the file I posted was there. It doesn't have to be that directory structure, just whatever directory you have it in. My program should work in any directory, you may just have to repoint it to the Keithley_Datafile migrated.vi.
The VI I posted will grab all the data from the datalog. You can use it to get the arrays used for the graphs. The VI I posted just used the data needed for the data text file for Excel, but the cluster contains all the data from the VI.