Dear Users,

I am a new user of the sem package.
I have a model that is being flagged by sem as "S is numerically singular:
expect problems"

I have checked John Fox's response to a similar problem. Obviously the
variance-covariance matrix is singular, but none of the possible reasons
seems to hold in my case.

Any leads how I could get the model to work?

from Prof. John Fox

That seems to me a reasonably informative error message: The
observed-variable covariance matrix is singular. This could happen, e.g., if
two observed variables are perfectly correlated, if an observed variable had
0 variance, or if there were more observed variables than observations.

Thanks


-- 


     *Amarnath Bose*
* **Associate Professor                       *
*Decision Sciences Department*
*Birla Institute of Management Technology
*
Tel:  +91 120 2323001 - 10 Ext.: 398
Cell: +91 9873179813

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