Forcing extra iterations


!EXTRA n requests an extra mod( n,10) rounds of iteration after apparent convergence. The default for n is 1. This qualifier has lower priority than !MAXIT, ABORTASR.NOW and FINALASR.NOW.

Convergence is judged by changes in the REML log-likelihood value and variance parameters. However, sometimes the variance parameter convergence criteria has not been satisfied when the LogL criterion has been met. Usually the divergence is inconsequential but !EXTRA allows the user to perform extra iterations.

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