https://userapps.support.sap.com/sap/support/knowledge/en/2591604
2591604 - No valid source of supply could be found with BAPI_MOSRVAPS_CREATESNPORDER | SAP...
Utilize BAPI_MOSRVAPS_CREATESNPORDER to create a SNP planned order. Observe the error "No valid source of supply could be found [product] [location]" message...