Hi, I'm getting the following message All observations have the same response. No statistics are computed. when I run the following code: PROC SORT DATA=mydata.dataset; by microchip_id; run; DATA check1; SET mydata.dataset; lagid=lag(microchip_id); lagresult=lag(result); flag=0; IF microchip_id = lagid AND lagresult=0 THEN flag=1; IF age='Cub' THEN age= 'Juvenile'; RUN; PROC LOGISTIC DATA=check1; CLASS zone (REF='C') sweep (REF='8') age (REF='Juvenile') sex (REF='M') /PARAM=REF; MODEL result (REF='0')=zone; WHERE flag EQ 1 ; RUN; It used to work but now it suddenly stopped working. Does anyone has any idea? I do have one missing value, but if I delete that value, the same error occurs. Thanks in advance.
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