jpeg to bdf conversion seems to be attempts to export pictures exported as EPS (Encapsulated Postscript files) to Okino Transfer File format (.bdf), something that is most likely not doable because BDF format is used to store a snapshot of 3D format and not just mere vector drawing.
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.