When you set FILE_TRACE_TIMESTAMP to 1 (on, true, yes), AcuServer places a timestamp at the beginning of every line in the trace file. The format of the timestamp is HH:MM:SS:mmmmmm, where mmmmmm is the finest resolution that ACUCOBOL-GT can obtain from the system.
Timestamp information is included only when file trace information is directed to a file. Timestamp information is never included in file trace output that is sent to the screen.