[BktBallRef]

Originally Posted by mbyron

You are told incorrectly. Not a violation.

Casebook:

9.1 COMMENT: While Rule 8-1 clearly states which marked lane spaces must
be occupied and by whom, a team forfeits its right to any space not occupied
before the free throw starts (when the ball is placed at the disposal of the free
thrower). Once a free throw starts, no player occupying a marked lane space may
enter or leave such space or break with either foot the vertical plane of any lane
or lane-space boundary until the ball touches the ring or backboard or until the
free throw ends. Players who do not occupy a marked lane space may not have
either foot break the vertical plane of the free-throw-line extended and the vertical
plane of the three-point line until the ball touches the ring, or the backboard,
or the free throw ends. No player may enter or leave a marked lane space after
the ball is placed at the disposal of the free thrower until the restrictions have
ended as outlined.

Or what I said in plain English.