Error while using method=type3 in proc mixed

[satish123]

Hi,

i got an error message while using method=type3 in proc mixed, saying that 'Error: Type 3 estimation is not available with this model.'.

i don't know what is the reason behind this error. well here i'm using Area under effective curve data and model was

proc mixed data=study.detectors7 method=type3;
classes sub trt;
model data= trt/ ddfm=sat;
random trt/type=FA0(2) sub=sub g;
repeated/group=trt sub=sub;
estimate 'T vs R' trt -1 1/cl alpha=0.1;
run;

version: SAS Enterprise guide 6.1

[Rick_SAS · Accepted solution]

Here is the documentation for PROC MIXED. Click on the "PROC MIXED" statement and scroll down to the METHOD= option. There you will see

The METHOD=TYPEn specifications apply only to variance component models with no SUBJECT= effects and no REPEATED statement. 

The error occurs because your model includes a REPEATED statement and subject effects.

If you want to model the repeated and random effects, consider using METHOD=REML (the default) or METHOD=ML  (maximum likelihood).