First, create a data set called CHAR1 by running the following DATA step:
Create a new data set ERROR containing any observations in CHARI that meet anyone of the following conditions:
1. A value other than an ‘X’, ‘Y’, or ‘Z’ for the variable STRING1.
2. A value other than an ‘A’, ‘B’, ‘C’, ‘0’, or ‘E’ in STRING2.
3. A value other than an upper- or lowercase ‘N’ or ‘Y’ for the variables C1-C5. (NOTE: Blank values of CI-C5 will place the observation in the ERROR data set.)