I got an email dated 3/29/07 0713 that one of my tracked aircraft had departed and was due to arrive at 0921. But there has been no notice of having landed & the tracking shows result unknown and there is no track log.
Canceled IFR after takeoff and continued VFR?
Can’t really help if you are going to leave out a small detail such as the flight id.
Looks like there was some problem where we never received an arrival message for that flight. Last radar hit was 09:10 EDT descending out of 2500ft at 177kts, so presumably it arrived. Sorry about dropping the ball.
Sorry bout that - it’s N943JB. Airport data for KDMW shows it having arrived before departing KPBI.
(Maybe he found the solution to the energy crisis?)
Not only that, but time travel as well! 
N943JB took off from KDMW at about 1753 on 29/3/2007:
here is the alert I got from FA at 2254 29/3/07:
Your tracked aircraft N943JB has just filed a flight plan. It is scheduled to depart KDMW (Carroll Co Regional Jack B Poage Field) at 23:00 EDT heading for KPBI Palm Beach Int’l for an arrival at 01:05 EDT.
Expected route: DAILY J61 HUBBS KEMPR WETRO DIW AR19 AYBID FRWAY2
Here is the one I got at 1958 29 Mar 07:
Your tracked aircraft N943JB has just arrived at KPBI (Palm Beach Int’l) from KDMW (Carroll Co Regional Jack B Poage Field).
Prior to that, I got at 1920 on 29 Mar 07:
Your tracked aircraft N943JB has just filed a flight plan. It is scheduled to depart KDMW (Carroll Co Regional Jack B Poage Field) at 21:15 EDT heading for KPBI Palm Beach Int’l for an arrival at 23:20 EDT.
Expected route: DAILY J61 HUBBS KEMPR WETRO DIW AR19 AYBID FRWAY2
and at 1758 29Mar07, I received (and FA reflects on flightaware.com/live/airport/KDMW) :
Your tracked aircraft N943JB has just taken off from KDMW (Carroll Co Regional Jack B Poage Field) en route to KPBI (Palm Beach Int’l) for an arrival at 19:58 EDT.