If you are looking for a way how to open older Nikon RAW images in a program that only support Fuji format (*.raf), then you do not need to convert NEF to RAF, which may not even be possible. Export NEF to DNG and import the DGN in a program of your choice. This will allow you to work with your RAW image independently of vendor-only digital photo editing tools.
This conversion entry was verified by us and conversion was flagged as wrong or not possible.
Usually this happens when the conversion would try to convert different types of data between each other, such as audio to image, or it is not possible because incompatibility between programs, caused by closed file formats, very limited support etc.
If you find entry that you feel is flagged as bad wrongly, please tell us in the discussion below with as much as information as possible so we can fix it.