It doesn't seem that there is any kind of bup to vob conversion doable, not in the proper, file conversion sense. BUP is just a backup of IFO files and these are metadata for actual video files (.vro or .vob). So as you can see this export does not make much sense, except if you are looking for a way to export both .bup/ifo and .vro/vob together to some container format, let's say MPEG-4 (.mp4).
Updated: September 6, 2023
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.
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