Property "MxSshKeyPassword" is undefined by upgrade to 5.1

[Udo Hillenbrand]

Hello,
by the upgrade from 4.2 to sim 5.1 following error is displayed:

alert01:/usr/local/src/mxserver # /opt/mx/bin/mxinitconfig -a
Checking Requisites (14):
1. Check Kernel Parameters ..OK
2. Server Property File ..OK
3. Server Authentication Keys ..OK
4. SSH Keys ..OK
5. Status Property File ..OK
6. Task Results Output Cleanup ..OK
7. Database Configuration ...OK
8. Database Content ..OK
9. Web Server ..OK
10. Setup Property File ..OK
11. JBoss Setup ..OK
12. Agent Configuration ..OK
13. Management Services ..OK
14. Initialization and Database Population ..OK
Requisite scan completed successfully.

Configuring Server Components (14):
1. Check Kernel Parameters ..Done
2. Server Property File ..Done
3. Server Authentication Keys ..Done
4. SSH Keys ..Done
5. Status Property File ..Done
6. Task Results Output Cleanup ..Done
7. Database Configuration ........Done
8. Database Content ..Done
9. Web Server ..Done
10. Setup Property File ..Done
11. JBoss Setup ..Done
12. Agent Configuration ..Completed with error.

Details can be found in the log files at: /var/opt/mx/logs
Configuration failed to complete due to the following exception:
Property "MxSshKeyPassword" is undefined.

Where I must define this value???

Thanks

MFG Hillenbrand