Do not know if it is the same, but this happens quite often when I have made a mistake while editing PluginFurnitureCatalog.properties, for instance:
- cutting and pasting properties and forgetting to change the numeric identifier (see this post in thread 4765),
- putting in a comma as a decimal separator,
- some other illegal line.

It seems to me that FurnitureLibraryEditor and SH3D then stops reading objects from the offending line on.

ok