Error 99006 — Feed too large

Your feed file exceeds Amazon's size limit (typically 25MB-50MB depending on type). Amazon refuses to process it.

Limits prevent timeouts during processing. Bulk catalog feeds with thousands of SKUs can easily exceed.

1. Split feed into chunks of 10,000-25,000 rows each.
2. Use compressed (gzip) submissions — typical 70-80% size reduction.
3. For incremental updates, use POST_INVENTORY_AVAILABILITY_DATA (smaller, faster) rather than POST_PRODUCT_DATA.

• Compressing without setting content-encoding header
• Resubmitting the same large feed — won't work