Error 99001 — Feed processing exception

Amazon's feed processor encountered a generic error while processing your feed — usually XML/CSV malformed, encoding issue, or a server-side timeout.

Common causes: BOM character at the start of UTF-8 files, mixed line endings, malformed XML (missing closing tags), CSV with quoted values containing newlines, or feed size exceeding limits.

1. Check the feed file in a hex editor for a BOM (EF BB BF) at the start — strip it out.
2. Validate XML against Amazon's XSD schemas using xmllint or similar.
3. For CSV/TSV, ensure all quoted fields are properly closed and don't contain unescaped delimiters.
4. Reduce feed size to under 50MB per submission; split large feeds into chunks.
5. Resubmit and check the processing report 30 minutes later.

• Excel-saved CSVs introduce smart quotes and BOMs — export from Excel as UTF-8 explicitly
• Carriage returns within product description fields breaking CSV parsing