The following files should be contained in the subfolder called NonLinQ, of the parent folder (e.g. ODemo) which contains Origin50.exe, or Origin60.exe: ReadMe.txt 798 2wlFit.OPJ 18,521 Bands.otp 2,568 Chem.otp 2,652 Copy of Example.OPJ 8,727 Copy of Example6.OPJ 16,426 Example.OPJ 8,727 Example6.OPJ 16,426 Example.otw 2,736 Gbands.OPJ 14,211 GbFit.OPJ 82,787 GLbands.OPJ 14,670 Ramette.dat 161 User1.fdf 1,454 User2.fdf 1,684 User3.fdf 1,809 To customize Origin to run the OPJ project files, you have to open Example.OPJ project with version 5.0, or Example6.OPJ with version 6.0, then activate the "Layout1" page, and click the "Step 1" button. (This tells Origin where to find user defined function files User1.fdf, User2.fdf and User3.fdf.)