WARNING: Some character data was lost during transcoding in the dataset RESDAT.STK000001.
我的程序：
data a;
set ResDat.stk000001(obs=10);
keep date year qtr month day;
year=year(date);
qtr=qtr(date);
month=month(date);
day=day(date);
proc print noobs;
run;

在我的逻辑库中每次调用一些数据就会显示上面的话，或者直接错误！这个是为什么？谢谢了！