I run proc panel. But I obtain this error message
ERROR: No residual in the model to analyze. Computations will not be performed.
proc panel data=Joint_fixed printfixed;
id rank_no rankdate;
model estimate=logage logTNA logMT EXP_RATIO TURN_RATIO logtnasq / fixone noint HCCME=0 cluster;
ods output ParameterEstimates=res;
run;
Can you explain for me what is the reason for this error