Looking for a way to rename a large data file I found this
http://digital.ni.com/public.nsf/allkb/576434CD1B659EE386256F04006909AA
Since I need to rename large files I try get method 3 to work.
Attached the vi I use I'm using in LV 2012 on Win 8.1 Pro system
It's basically the one from the ZIP file in mentioned link changed a bit for my inputs.
Unfortunately the "Success?" LED never lights up and in the explorer the file isn't renamed eigther 
All inputs to solve this problem are welcome!
Regards
Alain