Debug command line options (D, E)
invoke debug mode and increase the information
written to the screen or .asl file. This information is not
useful to most users. On Unix systems, if ASReml is crashing use
the system script command to capture the screen output rather
than using the L option,
as the .asl file is not properly closed after a crash.
requests ASReml write screen output to a file with filename extension
.asr. Debug output is directed to this file.
One of the pieces of information reported by !DEBUG
is the execution time required for various parts of the first
iteration. The other information is not helpful to the general
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