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.