Dear Experts of SAS Support Community,   I have trouble: I am using SAS University Edition and would like to apply Proc Model for SUR to develop equations. My code is below :   proc model data=AllData; parms a1=0.6122 b1=0.7692 c1=0.3694 a2=0.6122 b2=0.7692; AGB = a1*(DBH2HWD**b1)*(CA**c1); h.AGB = 1/DBH2; BGB = a2*(DBH2H**b2); h.BGB = 1/DBH2; TB = a1*(DBH2HWD**b1)*(CA**c1) + a2*(DBH2H**b2); h.TB = 1/DBH2; fit AGB BGB TB / sur outest = Alldata_est; run;  and then run I have received a notification of error as the following: ERROR: Procedure MODEL not found.   Please help let me know whether there is any wrong in the code; or does SAS University Edition support/provide that procedure?   Thank you very much in advance Bao Huy     ... View more