Thank both of your for your feedback. This following is a part of the log to illustrate the issue. Basically, I want to do a F-test of all interaction terms jointly for the parallel trend assumption. 629 proc surveylogistic data=data;
NOTE: PROCEDURE SURVEYLOGISTIC used (Total process time):
real time 0.00 seconds
cpu time 0.00 seconds
NOTE: The SAS System stopped processing this step because of errors.
630 class intervention month agegroup ;
631 model outcome= intervention month intervention*month agegroup / DF=INFINITY ridging=absolute
631! ;
632 test1: test month1=month2;
633 test2: test month1=month2=month3=0;
634 test3: test intervention*month1=intervention*month2;
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22
76
ERROR 22-322: Syntax error, expecting one of the following: ;, +, ',', -, /, =, {.
ERROR 76-322: Syntax error, statement will be ignored.
635 run;
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