Hessian error - Unconditional Linear Growth Model using SPSS
Getting the following errors when running a null model to assessing ICC for
some DVs but not all. Any reason why it would work for some DVs and not
64 Mixed The final Hessian matrix is not positive definite although all
convergence criteria are satisfied. The MIXED procedure continues despite
this warning. Validity of subsequent results cannot be ascertained.
This covariance parameter is redundant. The test statistic and confidence
interval cannot be computed.
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