各位高手大家好，有个问题想请教各位，因为我想得到回归式中的残差项，但一直发生问题，想请问一下各位高手帮我看看，我的问题是出在哪?应如何解决呢? 先谢谢各位了! 我的程序如下:

data dd3;

set dd2;

e1=c1-d1;

e2=c2-d2;

e3=c3-d3;        

e4=c4-d4;        

e5=c5-d5;

e8=c8-d8;

e9=c9-d9;

e10=c10-d10;

e17=c17-d17; tacta=log(e2-e1-e3+e4+e5-d6);

taag=log(1/d7);

rear=log((e8-e9)/d7);

ppeta=log(c10/d7);

drop name;

run;

proc reg data=dd3;

model tacta=taag  rear ppeta;

output out=b22 p=ta r=diff;

run;

出现之错误讯息:

/*you cannot open work.z1.data for input access with record-level control because

work.z1.data is a in use by you in resource environment reg. work.z1.data cannot be openned.

Do you want to select a different table to open.*/