Special .iwa archives found inside various iWorks documents (.pages, .numbers etc.) usually just contain settings and metadata and not the actual document data, so it is unlikely that you can export and save any data from it to CSV 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.