Inventor presentations (.ipn) are used to demonstrate a single 2D view or a 3D rotation of certain part or assembly, as such these can be usually exported as videos (.mp4, .wmv) and the original parts and designs cannot be exported back to CAD format, such as DXF. As such, a direct ipn to dxf conversion does not seem very likely.
You would have to access the original source that was used to create the presentation (likely .ipt file) and use that to produce a CAD file, for example in DXF format.
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.
