Understanding Error 99056: Attribute Character Limit Violations in Amazon Feed Files
Error 99056 is triggered when a feed attribute exceeds its character limit, such as a 210‑character title surpassing the 200‑character ceiling. Amazon discards only the over‑length field while processing the rest, and the error payload names the attribute and allowed limit. Sellers can audit 5,000 SKUs to trim titles, bullets, or search terms to stay compliant.
Overview
Amazon flags Error 99056 whenever a value in a flat‑file or API feed exceeds the character limit set for that attribute. The error appears during the feed validation stage, causing the offending field to be ignored while the rest of the file may still be processed. Sellers need to understand the rule, locate the offending attribute, and correct the length to keep listings live and complete.
Key Points
- Attribute‑specific limits — Every catalog field, from product title to backend search terms, has a maximum character count defined by Amazon; exceeding any limit triggers Error 99056.
- Partial acceptance — When the error occurs, Amazon discards only the over‑length value; all other correctly sized fields continue to load.
- Clear error reporting — The response payload names the exact attribute and states the allowed character maximum, making it easy to pinpoint the problem.
- Universal enforcement — Whether you upload via flat files, the Listing Loader, or a Marketplace Web Service (MWS) API, the same length constraints apply.
- Common culprits — Titles, bullet points, product descriptions, and search term fields are the attributes most frequently over the limit.
How Error 99056 Works
- Feed submission — You upload a CSV or XML feed containing product attributes. For example, a notebook listing includes a 210‑character title, three 250‑character bullet points, and a 300‑character search term field.
- Attribute validation — Amazon’s ingestion engine checks each cell against the catalog schema. The 210‑character title exceeds the 200‑character ceiling, so the system flags it.
- Error generation — The engine returns a response line such as “Error 99056 – Title exceeds 200 characters.” The message also lists the attribute name and the permitted limit.
- Selective processing — Amazon skips the over‑length title but continues to ingest the remaining valid fields—bullet points, price, SKU, etc. The product may go live with a truncated or missing title.
Analysis & Recommendations
Why This Matters
Over‑length titles are omitted, causing blank titles that lower click‑through rates, while dropped bullet points and search terms reduce conversion and discoverability. For example, a 210‑character kitchen gadget title is removed, and a 300‑character keyword string is ignored, directly impacting sales velocity.
Key Takeaways
- Error 99056 flags any attribute that exceeds its defined character limit, e.g., title >200 chars.
- Amazon returns a response line naming the attribute and the permitted maximum, allowing precise pinpointing.
- Common offending fields are titles (200‑char limit), bullet points (250‑char), and backend search terms (300‑char).
- A bulk audit of 5,000 SKUs can isolate titles longer than 200 characters using spreadsheet filters.
Recommended Actions
- →In Seller Central, download the active feed template, add a LEN() column for Title, and filter rows >200 characters.
- →Run a sandbox test: submit 10 sample items via the MWS test environment and verify no Error 99056 appears.
- →Update SOPs in Seller Central > Listings > Create New Listings to include a mandatory character‑limit check before feed export.
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