Re: [R] SEM : Warning : Could not compute QR decomposition of Hessian

partment of Sociology McMaster University Hamilton, Ontario, Canada web: socserv.mcmaster.ca/jfox -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Anne Mimet Sent: August-25-10 10:27 AM To: r-help@r-project.org Subject: [R] SEM :

[R] SEM : Warning : Could not compute QR decomposition of Hessian

Hi useRs, I'm trying for the first time to use a sem. The model finally runs, but gives a warning saying : "In sem.default(ram = ram, S = S, N = N, param.names = pars, var.names = vars, : Could not compute QR decomposition of Hessian. Optimization probably did not converge. " I found in