先是学的SAS9.2， 现在为了用EM 装了9.13发现版本之间的 DATA STEP运行会有冲突， 也就是说，之前装的SAS版本在用DATA STEP时会出现错误提示（见下面），不过PROC 倒是没有发现问题。 因为当时学的是9.21，很多语法选项已经和9.13不一样了，有没有高人能够解决一下。

ERROR: Some character data was lost during transcoding in the dataset FE.ANALY_DATA_RAW. Either the data contains
       characters that are not representable in the new encoding or truncation occurred during transcoding.
NOTE: The DATA step has been abnormally terminated.
NOTE: The SAS System stopped processing this step because of errors.
WARNING: The data set WORK.B may be incomplete.  When this step was stopped there were 0 observations and 9 variables.
NOTE: DATA statement used (Total process time):
      real time           0.01 seconds