Hi George,
The Load Regulation and Line Regulation sections of the Calibration procedure were added a few years ago. I believe you were using a version of Cal Exec that didn't implement these sections of the procedure previously. When you upgraded, these verification routines were added.
The entire calibration procedure is located here. Inside you'll find a description of each test that is performed along with equipment requirements and test conditions.
Regards,
Jared R.
Precision DC Product Support Engineer
National Instruments