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st: odd behavior of -sem- in Stata 13

From   Lance Erickson <>
To   "" <>
Subject   st: odd behavior of -sem- in Stata 13
Date   Thu, 11 Jul 2013 19:00:00 +0000

Has anyone experienced problems estimating SEM models in Stata 13 that ran without problems in Stata 12 (Windows 7)?

I had prepared some analyses that were successfully estimated by Stata 12 and now going back to them after installing Stata 13 there are some problems. Here's the code... 

sem (tenure skdis5r dauthority managersup satcowr satjobr <- WRKCNTXT) ///
	(meaningful <- WRKCNTXT) ///
	(perform <- marital WRKCNTXT meaningful) 
	if creative==1, ///
		covstr(e.satcowr e.satjobr, unstructured) ///
		covstr(e.satcowr e.managersupp, unstructured) ///
		covstr(e.dauthority e.satjobr, unstructured) ///

And here is the error I get ...

note: The following observed variable name will be treated as a latent variable: ANsample.  If this is not your intention use the nocapslatent option, or identify the latent variable names in the latent() option.
latent variable 'ANsample' not referenced in the model

The model does run in Stata 13 if I identify the latent variable in the -latent()- option as suggested by the error message. But, the SEM manual says that the command should identify variables as latent if the first letter is capitalized. Just to check, I did manage to access Stata 12 and run the exact same command runs fine without the -latent()- option. Could this be a feature change across the versions or is it a bug?

What seems particularly odd to me is that I was able to get Stata 13 to estimate the models by deleting any variables from the data set that weren't included in the model. I didn't need to add the -latent()- option either. I'm deleting many variables when I do this and I haven't taken the time to explore whether it's a single variable or set of variables that need to be deleted.

Again, does anyone know if there are known bugs with -sem- in Stata 13 that might account for this? Or am I ignorant to some new feature?


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