I have a question when I run the code, there is a warning of proc reg - spec, the following is my log file
I have marked as pink color, please help me to solve this warning.
This Tech Support note mentions your error message:
http://support.sas.com/kb/22/900.html and, as part of the explanation, references H. White paper, which is shown on this page: http://support.sas.com/documentation/cdl/en/statug/68162/HTML/default/viewer.htm#statug_reg_referenc...
Those might be helpful in figuring out your data.
This user group paper on using PROC REG might also be a useful paper
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