Visible crew/equipment: When Mac and Lt. Vukovic question Anwar about why he killed the crew of the Pulau, a red "T" of actor's tape is visible beneath Vukovic's feet. (00:16:15)
Deliberate mistake: During the civilian sheriff's pursuit of the Navy car, the sheriff is occasionally visible in the passenger seat of his patrol car instead of the driver's seat.
Second Acts - S8-E19
Continuity mistake: When Admiral Chegwidden is at the SECNAV's office, he raises a glass of scotch up to his mouth. In the next shot, the hand holding the glass is down in his lap. (00:26:45)
Critical Condition (3) - S8-E1
Continuity mistake: When Mac is trying to decide which book to pack, she is looking at both front covers. When the shot changes, she is instantly looking at the back cover of the book in her left hand. (00:04:35)
Continuity mistake: When Commander Turner hands Harm the document regarding Harm's steering wheel, Harm takes it with his right hand. In the next shot, he's suddenly holding the document in his left hand. (00:20:40)
Answer: Officially, the individual has been ordered to attend, failing to could be interpreted as either, Failure to follow orders, dereliction of duty, going AWOL, or even desertion. It would depend on the underlying reason as to why the person doesn't appear.