3420646 - "No customer master is linked to business partner" message raised in Service Order.

When assigning a Partner function in the Manage Service Order app, the error "No customer master linked to Business Partner" is raised.

SAP S/4HANA Cloud

1. Open the Manage Service Order App.
2. Select relevant Service Order record. 
3. Click Edit. 
4. Attempt to add a new value under the Partner section.
5. Error is raised. 

The Business Partner selected to be added as a new value in the Partner Section is not extended to the Customer role. 

1. Open the Maintain Business Partner App. 
2. Select the relevant record. 
3. Put the Business Partner into edit mode. 
4. Select the Role dropdown. 
5. Set the value as FCLU01.
6. Enter the relevant Sales and Distribution data.
7. Click Save. 

BP, Business Partner, No customer master linked to Business Partner, service order, s/4hana cloud, s/4hana, service, sales and distribution, role, FLCU01 , KBA , CRM-S4-SRV-SVO-2CL , S4CRM: Service Order (Public Cloud) , LO-MD-BP , Business Partners , Problem