I want to estimate a GMM based on a LGCM with freely estimated factor loadings and autocorrelated residuals. If I extend this model to a mixture model with 2 classes, and only specify an %overall% model, I have no problems. However, as soon as I try to free any additional parameters across classes (such as the factor loadings), I get the following error:
*** ERROR in MODEL CONSTRAINT command A parameter label or the constant 0 must appear on the left-hand side of a MODEL CONSTRAINT statement. Problem with the following: BMI258* =
Ideally I'd like to look at a mixture model where every parameter if freely estimated between classes. Any ideas on where I'm going wrong? Many thanks.