Weird Error Message

[mark.everett]

I had a user tell me that she updated a task to increase the hours.
She got an error message saying that action would cause another task to
become late. She canceled out of the action and went to the referenced
task. It is an orphan task, with no predecessor or successor tasks,
but with a "Start No Later Than" constraint. She didn't see how that
could be affected by the other task, so went back and tried the hours
increase again, and this time, it was accepted, with no error message.


Any idea what caused this?

Thanks,
Mark S. Everett