Issue with CLASS statement in PROC MIXED

[alexandra-vita]

I am trying to use PROC MIXED for the first time with my own data (I have only used this in a biostats course with a pre-defined template for the given data) and I keep receiving this error for my CLASS statement:

"ERROR 180-322: Statement is not valid or it is used out of proper order."

My code is below:

PROC MIXED
DATA= GGGImp.TNFa    METHOD= REML;
CLASS= treatment (ref="A") sequence (ref= "AB") period (ref= "P1") time (ref="V1");
MODEL TNFalpha = sequence treatment time period sequence*time period*treatment / SOLUTION;
RANDOM intercept / SUBJECT=subjID g vcorr;
RUN;

What's interesting is this general template worked for similar data in my biostats course, so not sure where I am going wrong here. Any help is extremely appreciated.

[ballardw · Accepted solution]

Remove the = immediately after Class.

Should look like:

CLASS  treatment (ref="A") sequence (ref= "AB") period (ref= "P1") time (ref="V1");

[alexandra-vita]

Wow, thank you so much, it worked!

[JOL]

Try removing the "=" sign after class

CLASS  treatment (ref="A") sequence (ref= "AB") period (ref= "P1") time (ref="V1");