you have to fix the record that doesn't meet you constrants.
ic create Low_ck = check(where=(Low is not missing))
message = "Low price must not missing"
msgtype = user;
you data has 1 record with missing low price.
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Yes, I have already taken the Programming 1 and Statistics 1 classes course. Now I will check the newer version of Cody's book using SAS University Edition. Thank you so much for your help, I really do appreciate it.
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