MIMIC model and non-unique solutions PreviousNext
Mplus Discussion > Categorical Data Modeling >
Message/Author
 Anonymous posted on Friday, March 02, 2012 - 11:45 am
I am attempting to fit a MIMIC model using the WLSMV estimator and obtain the following error message:

THE STANDARD ERRORS OF THE MODEL PARAMETER ESTIMATES COULD NOT BE
COMPUTED. THE MODEL MAY NOT BE IDENTIFIED. CHECK YOUR MODEL.
PROBLEM INVOLVING PARAMETER 9.

I have attempted to supply starting values for the parameter concerned and can obtain convergence. However I have noticed that supplying different starting values gives different solutions.

I have tried exploring random starts as I would with mixture modelling but get the following message:

*** WARNING in ANALYSIS command
The STARTS option is not available with TYPE=GENERAL and ESTIMATOR=WLSMV.
STARTS settings will be ignored.

Are there workarounds for this issue when fitting a MIMIC model ? Many thanks for any guidance you can offer.
 Linda K. Muthen posted on Friday, March 02, 2012 - 11:59 am
Please send the relevant files and your license number to support@statmodel.com.
Back to top
Add Your Message Here
Post:
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action: