Issue
R2 UNC station fails to start and displays the following error message in its standard output window:
FATAL: cannot boot station from sns
java.lang.ClassNotFoundException: tridiumx.vlon.VlonService
Environment
Niagara R2, UNC-520-2,
Cause
The station being installed requires the vlon service, but the vlon module in not installed in the UNC.
Resolution
Install the vlon module into the UNC and restart the UNC.
Install the vlon module into the UNC:
- Use Admin Tool to connect to the UNC.
- Go to the 'Installation' tab and click on 'Installation Wizard'.
- In the Select Distribution Directory dialog, highlight 'emb' and click the 'Install' button.
- In the Niagara Remote Installation dialog, select 'Configure Modules Only' and click 'Next'.
- In the Configure Modules dialog box, select the vlon module by selecting in the 'Upgrade/Add' column. Click 'Next when finished.
- On the Database Backup dialog box, leave the red check mark next to the station database name and click 'Next' to continue. Enter the station user name and password when prompted.
-
In the Niagara License dialog box, click Finish.