Error 99041 — Feed ingestion checksum failed

Amazon detected that the feed file you uploaded was corrupted or modified in transit — its checksum doesn't match what your client claimed.

Network errors, encoding conversions during upload, or file modifications between hash and upload can corrupt feeds. Amazon validates with MD5/SHA256.

1. Recompute the file's MD5 hash and verify against what your client sent.
2. Avoid editing the file between checksum and upload.
3. If using SP-API, use the binary upload endpoint with verified hash.
4. Resubmit.

• Line-ending conversion (LF → CRLF) during upload — breaks hash
• Re-saving the file after computing the hash