Nic,
I assume that the variable "Age" does not change across those time points for each subject, so it should be considered as a between- (not within-) subject variable. In addition, you need to declare that "Age" is a quantitative variable:
-bsVars 'Age' \
-wsVars 'Time' \
-qVars 'Age' \
Gang
Edited 1 time(s). Last edit at 12/20/2016 11:24AM by Gang.