2485259 - Client is not available when accessing step Maintain RFCs on SAP Solution Manager 7.2

• Following error occurs when accessing step Maintain RFCs:
  Error connecting to system <SID>, client <NNN>: Client <NNN> is not available in this system
  

• Or the following error occurs when updating or creating Managed System Setup User:
  Client <NNN> does not exist for system <SID>.
  

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."

SAP Solution Manager 7.2

Client, is not available in this system, SM_<SID>CLNT<NNN>_READ, SCC4 , KBA , SV-SMG-INS-CFG-MNG , Managed System Configuration , Problem