Overview

Error 99001 is one of the most common issues Amazon sellers encounter when uploading product listings through flat file templates in Seller Central. This error triggers when a required field is left blank in your listing spreadsheet, preventing the file from being processed. Understanding how to identify and resolve this error can save sellers significant time and frustration during the listing process.

Key Points / What Sellers Need to Know

• Required fields must be filled - Every product listing template contains mandatory columns that cannot be left empty, and missing even one will trigger Error 99001 and block your upload.
• Red-highlighted cells indicate required fields - After selecting your product type in column A, the template automatically highlights all mandatory attributes in red, making them easy to spot before submission.
• Template freshness matters - Using listing templates older than 90 days can cause errors because Amazon regularly updates its attribute requirements, and outdated templates may not reflect current standards.
• Drop-down values must match exactly - Certain fields like product type use validated drop-down selections, and pasting values over these cells instead of selecting from the menu can trigger backend validation errors.

How the Error Occurs

Error 99001 appears with the message "A value is required for this column" followed by the name of the specific field that was left empty. This happens during the file validation stage when Amazon's system checks your uploaded template against its current listing requirements. Each product type on Amazon has its own set of required, preferred, and optional attributes, and the required ones must all contain valid data for the upload to succeed. Sellers most commonly run into this error when they overlook a highlighted cell, use an outdated template that lacks newly required fields, or accidentally clear a cell while editing their spreadsheet.

How to Resolve Error 99001

When you encounter this error, start by opening your listing template and selecting your product type in column A. The spreadsheet will then highlight all required attribute cells in red. Carefully review each highlighted cell to confirm that every one contains a valid entry. You should also check the "Valid Values" and "Data Definitions" tabs within your template, as these reference sheets clarify what each field expects and whether it is required, preferred, or optional. If the attribute mentioned in the error message does not appear in your current template at all, download the latest version of the template for your product type directly from Seller Central, transfer your listing data into the new file, fill in all required fields, and resubmit.