action
log-message string-expression
You can use log-message to write a message to the OmniMark log stream.
process log-message "Program start."
The OmniMark log stream writes to standard error unless it is redirected to a file specified by -log on the command line.
Note that information written to #error is not redirected to the log file.
log-message appends a line-feed to the message as it is output.