ERROR: No valid observations are found.
NOTE: The above message was for the following BY group:
id=10 startmonth=199603
SAS 程序中都已经都加了options nonotes nosource nosource2 errors=0; 还会在LOG WINDOW窗口中显示ERROR MESSAGE.太多的MISSING VALUE,循环50次(总共需要循环到2000),SAS log window就满了。
已解决 :-)



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