Overview

Error 99011 is a common feed processing warning that Amazon sellers encounter when uploading inventory files, flat files, or data feeds through Seller Central. This error occurs when a value provided in one column of your feed is either invalid on its own or conflicts with a value supplied in another column. Understanding what triggers this error and how to resolve it is essential for sellers who regularly manage their catalog through bulk uploads.

Key Points / What Sellers Need to Know

• Values are silently ignored — When Error 99011 triggers, Amazon does not reject your entire feed. Instead, the specific field containing the problematic value is skipped, and the rest of the row may still process. This can lead to incomplete or unexpected listing data.
• Two root causes exist — The error fires either because a column value is inherently invalid (wrong format, out-of-range, or not an accepted option) or because it logically conflicts with a value in a different column within the same row.
• Partial updates can cause confusion — Because Amazon ignores only the offending field rather than the entire row, your listing may update with some correct values while silently dropping others, making it harder to spot issues.
• Resubmission is required — To fully correct the listing, you must fix the problematic value and resubmit your feed. Amazon will not automatically retry the ignored field.

Common Causes

Error 99011 most frequently appears when sellers use inventory file templates or flat files to update product listings in bulk. Typical triggers include entering a value that does not match Amazon's accepted options for a given field — for example, providing a color name that is not in the allowed color map, or entering a package dimension in the wrong unit of measure. Another frequent cause is submitting values that contradict each other across columns, such as setting a fulfillment channel to FBA while simultaneously providing merchant-fulfilled shipping settings, or specifying a variation theme in the child row that does not match the parent listing's configuration. Data formatting mismatches, such as entering text in a numeric-only field or using an incorrect date format, can also trigger this warning.