Earlier command and setup reference · Engine 18.6.0rc590 / Reader 8.11.0rc649
What it means
Work records state no work time, so every total that includes them is unknown, not smaller.
What to do: Export the duration.
Do not turn missing time into zero
Suppose one work record has a duration of 20 minutes and another has no duration. A total that includes both records is unknown under this reference contract. Reporting 20 minutes as the complete total would silently assume that the missing record contributed nothing.
Trace the duration field
Check whether the original export contains the duration, whether the adapter reads it, and whether the value survived validation. If the source records the time, export and map that evidence. If it does not, retain the unknown value instead of borrowing a process-step span as a person's work duration.
Review work-time evidence before substituting another measurement. After a repair, revalidate the source and inspect the affected record before comparing totals with an earlier run.