Hi, when using the package sem with: sem.mod <- sem(model.SEM,cov.mod1, N=243)
I get the following error. Error in solve.default(C) : Lapack routine dgesv: system is exactly singular May someone tell me what is wrong, please? Thank your for your help, Luba [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.