Goal: Retain in ss16wa only those rows where "COW" (a column name) is 1, 6, or 7.
I tried using COW == 1 || COW ==6 || COW == 7
which ran into errors.
The image below, line 33, shows the new option that I have used which seems to work, but also cause an warning message of some sort.
If anyone knows a better solution then it will be much appreciated.