If an image file (eg, cover or spread) is ingested before the product data has been setup, the ingestion will fail .
...
with the following message:
| Warning |
|---|
Unrecognized isbn in file name '978X', File copied to hold directory |
...
The hold directory is located in the root of your SFTP ingestion account. If a product format is created later, TitleLeaf will retrieve the image file from the hold directory and try to ingest again.