Symptom
It is not possible to create any new messages in the SSCUI 102364 - System Messages for Purchase Order processing.
Not able to find the message in the respective sscui of the document to convert from W to E or Vice versa.
Environment
SAP S/4HANA Cloud Public Edition
Reproducing the Issue
When the SSCUI 102364 is opened in the Manage your solution app, under application area "Sourcing and Procurement" and sub-application area "Operational Procurement", no new messages can be created or the desired message is not found in the list.
Cause
When adding a new entry via SSCUI 102364, a customer namespace message version has to be defined here. This new message version is not going to work unless it is assigned to user parameter “MSV”. But in SAP S/4HANA Cloud Public Edition it is not possible to use user parameters in such a way.
Resolution
It is possible to modify the already existing messages but currently not possible to add new messages in the respective SSCUI.
So either,
1.Add this as a new feature request in Customer Influence Portal(CIP)
Search and Vote or Post Ideas on Customer influence forum
https://launchpad.support.sap.com/#/notes/2838428
or
2.Contact your developers to add the error message
Keywords
SSCUI 102364, Message versions, Expert configuration , KBA , MM-PUR-CNT , S/4 HANA Purchasing Content , Problem