Diagnosis
You have changed the representative list of rents.

System Response
Since the fixtures and fittings features refer to the previousrepresentative list of rents &, they are of no use to therepresentative list of rents &. The features are thus deleted when youpress ENTER.

Procedure
If you really want to make a change to the representative list ofrents, you should confirm this by pressing ENTER and then enter newfixtures and fittings features by selecting them in the "List offixtures and fittings features". If you did not purposely want tochangethe representative list of rents, you should re-enter theprevious one and the fixtures and fittings features are retained.