It seems that both .prdot and .drwprp files are templates from SolidWorks 3D CAD software, albeit used for a different purpose. A direct conversion between prtdot and drwprp or vice versa is very unlikely, but if you really need it and think it should be possible, consult SolidWorks support forums.
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.