update-I've managed to move past those problems to a new problem with reading the covariates. I can't get MEMA to reconcile a "covariates_center" command line with the "covariates_model" line. If I feed in a covariates file with labels motion sex age, and ask for -covariates_center= motion 0 0 sex = 0 0 age = 12 12 \
covariates_model center=same slope=different \
I get the error "Error in lop$covData * lop$Mat [, 2, drop = F] : non-conformable arrays
1:in FUN(newX[, i],...):
longer object length is not a multiple of shorter object length
2:same in FUN error
3: same in FUN error
Any help would be much appreciated!