Only whole documents can be exported as PDF documents and just their parts or auxiliary files are not enough. Style settings (.sty) are just that, settings and not whole documents, thus cannot be converted to anything else and this type of sty to pdf conversion is unlikely.
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.