How to Fix Error 6000: Unrecognized Column in Your Inventory File
Error 6000 appears when a bulk inventory column header doesn’t exactly match Amazon’s current template— even a trailing space, wrong case, or missing underscore will trigger it. Download the latest template from Seller Central’s “Add Products via Upload” page and run the file through the “Check My File” validation tool before uploading.
Overview
Sellers uploading bulk inventory files sometimes encounter Error 6000, which appears when a column header in the uploaded flat file does not exactly match the header defined in Amazon’s current template. The system then skips the data in that column, leaving the corresponding product attributes unchanged. Resolving the mismatch is essential to ensure that listings are updated accurately and to avoid repeated re‑uploads.
Key Points
- Exact header match required — Even a single misplaced space, a different capital‑letter pattern, or a missing underscore will cause the system to flag the column as unrecognized.
- Unmatched data is ignored — Amazon does not attempt to infer the intended field; any values placed under the wrong header are discarded during processing.
- Templates vary by product type — A column that is valid for “Books” may be invalid for “Home & Kitchen,” so using the wrong category template triggers the error.
- Error is a warning, not a rejection — The file continues to process, but the specific attribute tied to the faulty column will be absent from the affected listings.
- Template updates cause hidden mismatches — When Amazon releases a new version of a template, older files may contain deprecated column names that now generate Error 6000.
- Trailing spaces and hidden characters matter — A column header that looks correct in a spreadsheet can contain an invisible trailing space, leading the system to treat it as unknown.
How to Fix Error 6000
- Download the latest template — Navigate to the “Add Products via Upload” page in Seller Central, select the exact product type, and save the fresh CSV or Excel file. For example, a seller of kitchen appliances should download the “Appliances” template rather than a generic one.
- Compare column headers side‑by‑side — Open both the downloaded template and your own file. Align the header rows and look for any differences in spelling, punctuation, or spacing. If your file shows “Item Name ” (with a trailing space) while the template shows “Item Name,” the extra space must be removed.
Analysis & Recommendations
Why This Matters
A mismatched header causes Amazon to ignore the entire column, leaving product attributes unchanged and requiring costly re‑uploads. For example, using “Color” from a Clothing template in a Pet Supplies file results in the color attribute never appearing on listings. Fixing headers prevents silent data loss and saves time.
Key Takeaways
- Exact header match required; a single misplaced space or case difference triggers Error 6000.
- Templates vary by product type—using a Clothing column "Color" in a Pet Supplies file causes the error.
- Template updates introduce deprecated column names (e.g., "Manufacturer Part Number") that generate Error 6000 in older files.
- "Check My File" tool highlights remaining header discrepancies before processing.
Recommended Actions
- →In Seller Central, go to Inventory > Add Products via Upload, select the correct product type, and download the latest CSV/Excel template.
- →Open both the template and your file, compare header rows, and correct any trailing spaces, case mismatches, or missing underscores (e.g., change "...
- →Upload the edited file to Seller Central and run it through the "Check My File" tool; fix any highlighted issues before final submission.
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