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> Use this file to discover available pages before exploring further.
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# How to Resolve Common Errors in Shopify Feeds

This guide summarizes common issues that can occur when running Shopify feeds in Stock Sync and how to resolve them.

## SKU Mismatch
If a product is not updating:

* Check whether the SKU in the feed matches the SKU in Shopify.
* SKUs must match exactly, including leading zeros.
* If they differ, update either the feed or the Shopify product.

## Incorrect or Overly Strict Filters
If no products are imported or updated:

* Review filter settings such as vendor or tag filters.
* Removing or adjusting an incorrect filter often resolves the issue.

## Feed Shows No Match Found
If mapping shows an entire first row or fails to detect columns:

* The delimiter of the file may be incorrect.
* Try switching between comma or auto-detection.
* If the feed is supplier-owned and cannot be changed, ensure the mapping still correctly identifies SKU and quantity columns.

## Authentication Errors (FTP/URL Not Found)
If you receive a “feed not found” or login error:

* Verify username and password with the supplier.
* Even if the same credentials work in another store, confirm they are valid for this connection.

## Halt Due to Zero-Stock Warning
If the feed stops and many products appear set to zero:

* The halt protection may have paused the update.
* Check the "Halt if more than X% products are set to zero" slider.
* Increasing the threshold allows updates to continue.

## Inventory Policy Not Updating
If preorder items disappear from the store:

* Map the Inventory Policy field in the feed.
* Set values such as PREORDER, INCOMING, INQUIRY to Continue.
* Set all other statuses to Deny.

## XML or API Feed Not Applying Quantity Updates
If Shopify stock does not match the feed:

* Run a preview sync and check the change log.
* Confirm if the expected values appear.
* If not, share example SKUs to identify incorrect mappings.

## Feed Not Loading or Stopped Running
If a feed suddenly stops:

* Check automation settings to confirm the schedule is active.
* Review recent error messages in the feed history.

## Excluding Products From Updates
To prevent certain products from being updated:

* Add a tag such as `manual_price` or `manual_price_edit` to the products.
* Exclude this tag in your update feed filters.

This guide helps resolve common sync issues quickly. If errors persist, reviewing the feed preview and change logs usually reveals the cause.