Question:
Why does an Analytics File disappear when reprocessing from the Analytics Admin page?
Answer:
Analytics Files older than 180 days disappear when reprocessed.
A workaround is to upload the updated file using the same Data Map Template and Market as the existing file. This newly updated file replaces the existing files and it is possible to delete or reprocess the new files.
Related Documentation:
CRM Help Documentation: Processing Sales Data Files Using the Analytics Admin Page