大侠帮忙解决下好不好？谢谢！
我把程序和结果放在这里，请达人解决，谢谢你！
//Predicted probabilities for "All"
prvalue, rest(mean)

//Predicted probabilities for "White, 12 years education, no working experience"
prvalue, x(white=1 ed=12 exper=0)

//Predicted probabilities for "Non-white, 18 years education, 20 working experience"
prvalue, x(white=0 ed=18 exper=20)

//Presenting predicted marginal probabilities
//Race
prvalue, x(white=1) rest(mean)
prvalue, x(white=0) rest(mean)
//education
prvalue, x(ed=0) rest(mean)
prvalue, x(ed=6) rest(mean)
prvalue, x(ed=12) rest(mean)
prvalue, x(ed=16) rest(mean)
prvalue, x(ed=20) rest(mean)
//work experience
prvalue, x(exper=0) rest(mean)
prvalue, x(exper=1) rest(mean)
prvalue, x(exper=5) rest(mean)
prvalue, x(exper=10) rest(mean)
prvalue, x(exper=15) rest(mean)
prvalue, x(exper=20) rest(mean)
prvalue, x(exper=25) rest(mean)


结果是

//Predicted probabilities for "All"
. prvalue, rest(mean)
conformability error
r(503);

end of do-file

r(503);