Warnings

Figure 1. Warnings for reduced model
Warnings for reduced model

The warnings note that estimation of the reduced model ended before the parameter estimates reached convergence because the log-likelihood could not be increased with any change, or "step," in the current values of the parameter estimates.

Figure 2. Warnings for reduced model
Warnings for reduced model

Looking at the iteration history, the changes in the parameter estimates over the last few iterations are slight enough that you're not terribly concerned about the warning message.

Next