libname learn 'E:\sas\learning';
data learn.TestScores;
input ID $ Score1 Score2 Score3;
datalines;
1 90 95 98
2 78 77 75
3 88 91 92
;
run;

data new;
set learn.TestSocres;
AveScore = mean( Score1,Score2,Score3);
run;
title "Listing of Data Set New";
proc print data=new;
run;

请问上面的程序有什么错误呀？为什么一直提示没有数据运行不起来啊？