2037218 - javax.ejb.CreateException: Unable to log on to system <SystemID> in language en with user <RWB Service User>

The following error occurs in the Runtime Workbench (RWB) -> Message Monitoring:

Also the XPI Inspector trace with Example 18 (RWB) shows this JCO error too:

00024No connect to database, session terminated??????????????????????????
Thrown:
com.sap.mw.jco.JCO$Exception: 00024No connect to database, session terminated??????????????????????????
at com.sap.mw.jco.MiddlewareJRfc.generateJCoException(MiddlewareJRfc.java:456)
at com.sap.mw.jco.MiddlewareJRfc$Client.connect(MiddlewareJRfc.java:988)

Read more...

• SAP NetWeaver 7.0
• SAP enhancement package 1 for SAP NetWeaver 7.0
• SAP enhancement package 2 for SAP NetWeaver 7.0
• SAP enhancement package 3 for SAP NetWeaver 7.0
• SAP NetWeaver Process Integration 7.1
• SAP enhancement package 1 for SAP NetWeaver Process Integration 7.1
• SAP NetWeaver 7.3
• SAP enhancement package 1 for SAP NetWeaver 7.3
• SAP NetWeaver 7.4
• SAP NetWeaver 7.5

SAP NetWeaver 2004 ; SAP NetWeaver 7.0 ; SAP NetWeaver 7.1 ; SAP NetWeaver 7.2 ; SAP NetWeaver 7.3 ; SAP NetWeaver 7.4 ; SAP NetWeaver 7.5 ; SAP NetWeaver Process Integration 7.1 ; SAP enhancement package 1 for SAP NetWeaver 7.0 ; SAP enhancement package 1 for SAP NetWeaver 7.3 ; SAP enhancement package 1 for SAP NetWeaver Process Integration 7.1 ; SAP enhancement package 2 for SAP NetWeaver 7.0 ; SAP enhancement package 3 for SAP NetWeaver 7.0

CreateException, RWB, Runtime Workbench, session terminated, MSHOST, SMMS, Process Integration 7.0, PI 7.0, PI 7.01, PI 7.02, Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, Process Integration 7.30, PI 7.30, Process Integration 7.31, PI 7.31, Process Orchestration 7.4, PI 7.4, PO 7.4, Process Orchestration 7.5, PI 7.5, PO 7.5, XI, AEX , KBA , BC-XI-IS-WKB , Runtime Workbench / Monitoring , BC-MID-CON-JCO , Java-Connector , Problem