3643858 - Diagnostic Agent: Smdsetup script error "java.lang.IllegalArgumentException: SAPInst parameter 'port' is empty." - SAP Solution Manager 7.2

When attempting to connect the Diagnostic agent to Solution Manager or Managed Systems using the SMDSetup script, the following error occurs:

[-] Diagnostics agent maintenance setup starting ...
----------------------------------------------------

Execute the action 'managingconf' to update connection information to connect to Managing system.

Error occurs during the task execution.

Exception:
java.lang.IllegalArgumentException: SAPInst parameter 'port' is empty.
at com.sap.smd.setup.SetupTask.getParameter(SetupTask.java:339)
at com.sap.smd.setup.SetupMaintenance.executeManagingConfUpdate(SetupMaintenance.java:519)
at com.sap.smd.setup.SetupMaintenance.executeTasks(SetupMaintenance.java:211)
at com.sap.smd.setup.SetupMaintenance.main(SetupMaintenance.java:60)

SAP Solution Manager 7.2

SMDAgent, Diagnostic Agent, SMDsetup, script, port , KBA , SV-SMG-DIA-SRV-AGT , Agent Framework , Problem