昨天在同一台电脑上可以运行的SAS程序，主成分和因子分析，今天突然全都不能用了，系统提示;


ERROR: Permanent copy of file WORK._tf0029.ITEMSTOR was deleted.
ERROR: File WORK._tf0029.ITEMSTOR is not open.
ERROR: File WORK._tf0029.ITEMSTOR is not open.
ERROR: Variable RESID not found.
ERROR: Variable YHAT not found.

我重启SAS和计算机都不行，程序应该是没有问题的：

data one;
input x4 - x6 @@;
cards;
0.0000  0.4000  0.9227
0.5222  0.1500  0.3701
0.1819  0.6000  0.6733
0.3160  0.4500  0.2833
0.0000  0.7000  0.7282
0.8518  0.3500  0.6621
0.6160  0.3000  0.6521
0.7346  0.7500  0.6463
0.6436  0.5000  0.4777
0.8095  0.0000  0.0000
0.8211  0.3500  0.7382
run;
proc princomp out = two; var x4-x6; run;
proc rank data = two descending ties = mean out = three;
var prin1 ;
ranks rprin1 ;
run ;
proc print data = three; var x4-x6 prin1 rprin1 ; run;


请问问题出在那里？在线急等