第一次碰到这个运行错误警告 请大大们帮助解惑

shiyiming

460  proc means data=base8f;
461  by company_code cost_center asset_type;
462  var start_AMOUNT;
463  output out=base9f sum=T_DEPRE_ACNT_COST;
464  run;


(TASK:MEANS) Warning:  attempt to free a semaphores that is not locked

Traceback

NOTE: The SAS System stopped processing this step because of errors.
NOTE: There were 2 observations read from the data set WORK.BASE8F.
WARNING: The data set WORK.BASE9F may be incomplete.  When this step was stopped there were 0
         observations and 6 variables.
NOTE: PROCEDURE MEANS used:
      real time           0.04 seconds
      cpu time            0.02 seconds

465