Dear all, I am trying to do a multiple groups CFA in lavaan and I get the following message: ERROR: 'x' is empty My CFA model has 5 factors, 66 variables and a subset data of 231 cases. The model is cleaned of 0 variance variables. There's no error in the syntaxis like missing "+" or errors in variables names. It seems to be quite similar to this post: https://stat.ethz.ch/pipermail/r-help/2011-April/275481.html Where I can find the origin of the error? Where should I try first? Thanks for the help -- View this message in context: http://r.789695.n4.nabble.com/Error-when-CFA-with-lavaan-is-applied-tp4630066.html Sent from the R help mailing list archive at Nabble.com.