Dear All,
 
I am trying to run a program using SEM and the input data is a covariance matrix (polychoric correlations). However I get an error message which says:
 
                           is.triangular(S) : (list) object cannot be coerced to 'double'
 
Do not know what the problem is. Have done something almost similar without any problems.
 
Thanks very much
 
Simo


      
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