Yesterday the gear 14 cable on my wife's bike broke, not completely but enough to jam the cable. The break was just at the point that the cable enters the shifter when the shifter is is between gears 8 and 9, the position it needs to be in to be able to free the cable nipple. After battling to push the cable out as per the Rohloff manual and video for almost an hour but not making any progress because the cable was insufficiently stiff to overcome the resistance of the fraying, I eventually removed the shifter and used another piece of cable to support the the broken cable and force the nipple out of its seating. The attached image shows how short the cable was at the point of the damage.
Just posting this in case anyone else encounters a similar situation.