I encounter a problem when trying the fixed model for stage 1. The error info is
"Error in if (!all(isPD)) stop(paste("Group ", (1:no.groups)[!isPD], " is not positive definite.", :
missing value where TRUE/FALSE needed".
The dataset is exactly the same one I used in random model. I tried "fixed1<-tssem1(my.df, n, method="FEM", no.string="NA")", and NA is the expression in my dataset for missing values, but metaSEM seems not to accept this argument.
Would you please provide any hints?