The SOAP API methods "updatePrices" and "updateStock" would previously reject the complete request message by default if there was at least one product reference or at least one size reference in the message that didn't exist in the collection.

From the 16th of April we will by default start accepting such messages and silently ignore the product and size references that don’t exist in the collection.

If your interface depends on rejecting messages that contain non-existing product or size references, it is possible to send an additional boolean parameter named “failOnUnknownProducts” with the value “true” on the API methods “updatePrices” and “updateStock”.

The default value of this parameter is “false”, so if it is not passed then the message will always be accepted as mentioned above and the non-existent references are silently ignored.