AMTU error "Due to its dependency on Amazon Marketplace Web Service (MWS), AMTU will lose access to the MWS Reports API after August 31, 2023, and will be fully deprecated along with MWS on August 31, 2023."
One Stop Order Processing is written to use MWS for transferring order and stock details to/from Amazon. Amazon's new requirement is to use their new SP-API. We have been working with Amazon to use the new approach. However, Amazon have now stated, SP-API does not work for Windows Desktop Applications, which One Stop Order Processing is. To allow One Stop Order Processing to automatically transfer order and product details to and from Amazon it uses AMTU (Amazon Merchant Transport Utility),
Amazon have notified users of the Amazon Utility, AMTU (Amazon
Merchant Transport Utility) that it will shortly be discontinued.
There are 2 solutions to process Amazon orders going forward, described below:
Use another company's AMTU repalcement
More details at the following link:
Manually download and upload Amazon files
More details at the following link: