Purchase Orders are failing in production with the below error within the SAP Integration Suite, managed gateway for spend management and SAP Business Network:

The Supplier:[supplier ANID] and the Buyer:[buyer ANID]associated Connection is not configured or saved.. Suggested Action : Configure Connection information at Managed Gateway for Spend&Network portal -> Project -> Basic Information -> Connections or Managed Gateway for Spend&Network Portal -> My Configurations -> Connections. For instructions refer to Managed Gateway for Spend&Network Portal -> Resources -> Implementation Guides -> User Guide -> How to configure SAP Business Network connection.For further assistance, please contact Managed Gateway for Spend&Network Support with Error Code : CIG-PLT-00641

You are trying to send transactions to Production but you only have SAP Integration Suite, managed gateway for spend management and SAP Business Network projects in testing status so the transactions are failing since no connection is configured.

The SAP Integration Suite, managed gateway for spend management and SAP Business Network project is deployed only for in testing, it is necessary to move the same to Production so the PO's from Production start working.

1. Sign in to SAP Integration Suite, managed gateway for spend management and SAP Business Network.
2. Click My Configurations > Projects.
3. Select the desired project, click in Select > Edit
4. Click Next until you see the page where the tests are performed.

One of the steps to move the project to production, is to create test scenarios when you create the project. You can add the required test scenarios and schedule to run.

1. Once the test result is a pass, the highlighted buttons as above are enabled. You can click on the Run Buyer Test which will send an e-mail to the buyer admin and they need to approve the test results. You can also click on Skip Buyer Test and yourself can approve the test results.
2. If you skip the test you will see a page where the Go Live button will appear.
3. The date and the time on the screen will the current time (PST) and click on Go Live or you can also select a different date if you want to schedule the go-live of the project.
4. After the project is moved to Production, the PO's from PROD will no longer have the error.

If the projects are configured correctly, it's also possible that the issue is caused by an orphan connection under My Configurations > Connections.

Delete any connection that is not currently being used in the projects to avoid such inconsistencies.

SAP Integration Suite Managed Gateway > Managed Gateway for Business Network