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Why did my product or inventory Import/Export fail without showing an error?

If you have uploaded a product or inventory file and the sync appears to have run, but the changes are not showing up in WizCommerce,  the file may have failed validation silently. When this happens, WizCommerce rejects the file during processing but does not always display a visible error to the user, making it look like the sync ran when it actually did not.

The most common cause is a column header name that does not exactly match what WizCommerce expects.

» Why this happens

WizCommerce validates import files against a fixed list of required column header names. The match must be exact, including spacing, capitalisation, and any special characters. If a column header is even slightly different from the expected name, the file fails validation and the sync does not process.

A common example: using SKU_ID (with an underscore) instead of SKU ID (with a space). The file looks correct, the sync appears to run, but no changes are applied.

» How to check and fix it

  1. Export a fresh copy of the same data type (products or inventory) from WizCommerce using Manage > Import/Export.
  2. Open the exported file and compare the column header names in the exported file against the column headers in the file you uploaded.
  3. Look for any differences like underscores instead of spaces, missing words, extra characters, or different capitalisation.
  4. Correct the column headers in your upload file to exactly match the exported file.
  5. Re-upload the corrected file and check whether the changes now appear in WizCommerce.

Tip: The safest approach is to always start from a fresh WizCommerce export rather than editing a previously saved file. Exported files always have the correct column headers. Files that have been saved, reformatted, or opened in different software can sometimes have headers altered without it being noticed.

» If you are not sure which column is wrong

Contact help@wizcommerce.com with the file you uploaded. The team will review the validation log, identify the exact column causing the failure, and advise on the correction.

» Things to keep in mind

  • Column header names in WizCommerce import files are exact-match — spacing, capitalisation, and formatting all matter.
  • A sync that fails silently due to a column header issue will not overwrite existing data. Your current data in WizCommerce is safe.
  • Always use a fresh WizCommerce export as your starting template rather than reusing an old file, to avoid header drift over time.
  • The same validation rule applies to all import types — products, inventory, customers, and categories.

Still need help? Reach out to our support team at help@wizcommerce.com.