Maximum number of iterations
!MAXIT
!MAXIT n
sets the
maximum number of iterations; the default is 10.
ASReml iterates for n iterations unless
convergence
is achieved first. Convergence is presumed when the REML log-likelihood changes
less than 0.002* current iteration number and the individual variance
parameter estimates change less than 1%.
If the job has not converged in n iterations, use the
!CONTINUE
qualifier to resume iterating from the current point.
To abort the job at the end of the current
iteration, create a file named
ABORTASR.NOW
in the directory
in which the job is running.
To abort the job after one more
iteration, create a file named
FINALASR.NOW
in the directory
in which the job is running.
At the end of each iteration, ASReml
checks for these files. If ABORTASR.NOW is present,
the job stops, producing the usual output but not prediction.
Otherwise if FINALASR.NOW is present,
the job completes a FINAL iteration, producing the usual output
including prediction.
On case sensitive operating systems (eg. Unix), these filenames
must be upper case and are deleted when actioned
so nothing of importance should be in them.
If you perform a system level abort (CTRL-C or close the program window) output files other than the
.rsv
file will be incomplete. The
.rsv
file should still
be functional for resuming iteration at the most recent parameter
estimates (see
!CONTINUE
)
Use
!MAXIT 1
where you want estimates of fixed effects and predictions of random effects for the particular set of variance parameters supplied as initial values.
Otherwise the estimates and predictions will be for the updated variance parameters (see the
!BLUP
qualifier below).
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