There is no way how you could convert one digital RAW from one vendor to another, in this case Canon CR2 to Nikon NEF. The best course of action is to export it to some universal format like DGN with which you can work in almost any profesional digital photo editing and management software. This is useful when you have photos from your old camera but only software for your new camera from different vendor.
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.