Thanks for your reply. Yes, I should have explained it better. I'm using SAS 9.4 version. There is no error in Log page. However, in the output when the mean comparisons is done at the end of the table I'm seeing this: " The LINES display does not reflect all significant comparisons. The following additional pairs are significantly different: (15,32) (15,35) (15,31) (30,26) (30,8) (3,26) (3,8) (23,26) (23,8) (2,26) (2,8) (5,26) (5,8) (9,26) (9,8) (24,26) (24,8) (16,26) (16,8) (33,26) .... " My data set is attached here, and the command line that I used is as below: PROC glm data=trial; CLASS Group Dose AA ; MODEL First Second Total = Group Dose AA Group*Dose*AA / ss3; lsmeans Group*Dose*AA / lines pdiff tdiff stderr adjust=tukey;; RUN;
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