It is not possible to create any new messages in the SSCUI 102364 - System Messages for Purchase Order processing
SAP S/4 HANA Cloud
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.
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 S/4 HANA Cloud it is not possible to use user parameters in such a way.
In the SSCUI 102364 it is possible to modify the already existing messages.
New messages can be created by asking for non standard expert configuration. Product Experts or Customer Success Managers initiate this non standard expert configuration process.
SSCUI 102364, Message versions, Expert configuration , KBA , MM-PUR-CNT , S/4 HANA Purchasing Content , Problem