Hi My data looks like this dat X1 X2 Group 84 44 1 86 29 1 94 77 1 78 87 2 94 78 2 60 31 2 I use the formula form = cbind(X1,X2) ~ Group poLCA(form,dat) But i'm getting error stating that ALERT: some manifest variables contain values that are not positive integers. For poLCA to run, please recode categorical outcome variables to increment from 1 to the maximum number of outcome categories for each variable Please can any one help ----- Thanks in Advance Arun -- View this message in context: http://r.789695.n4.nabble.com/Help-in-poLCA-tp4602300.html Sent from the R help mailing list archive at Nabble.com.