There is no corresponding command or api call in livelink for that.If you are using an event script(oscript) you have to load the workstatus and then get the task and update its duration thru sql.Thru lapi it would be the same procedure.
The exact sql is vailable in OT KB.
If you want to see an event script that does it feel free to email me at appoos att hotmail doot coom.I don't have any lapi samples that does it sorry.
(the email addrees spoof is intentional sorry)
Did not quite comprehend the "duration" field question.
It probably depend on the map.WFmap tasks can certainly take duration in days or a hard stop date as well.
Well, if I called the wrong number, why did you answer the phone?
James Thurber, New Yorker cartoon caption, June 5, 1937