I have to modify part of a LV project written in 6.1. I started of writing a patch/VI for the project in 7.1.1, tested it and it worked fine. Then I save it from 7.1.1 > 7.0 > 6.1 and the code doesn't work. I have attached the 6.1 and 7.1.1 code that simply modifies a config data file.
Run both the VI version on the attached data file (save copies of it beforehand as the VI overwites/modifies the .dat file) and you should see for e.g.
4.6.2.1 Name=Pass
Change to
4.6.2.1 Name="4.6.2.1 Extend Ground Cycle"
with 7.1.1
and no change with 6.1