Amazon error 30: Inventory Loader - invalid quantity valueThe quantity column is not a plain non-negative whole number, or a quantity was supplied for a SKU that Amazon fulfils (FBA), where stock levels are controlled by the warehouse.How to fix error 30

Use whole numbers only - no decimals, commas, spaces or text such as 'in stock'.

Use 0 to zero out a listing; leave the field blank only when you intend no change.

For FBA SKUs leave quantity empty - FBA stock is not settable from a feed.

Set add-delete to blank for an update, or x to delete; do not use it to signal quantity.

All Amazon flat-file error codes