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When starting up, the Automation Engine Viewer shows the error "Viewer cannot be initialized".


  • Problem starting the Viewer: "Viewer cannot be initialized"
  • The Appserver.log file shows this message:
2020-01-28 08:16:13,948 WARN [org.jboss.system.ServiceController] Problem starting service jboss:service=WebService
java.lang.Exception: Port 8083 already in use.

This problem is caused by another program using port 8083.


  1. Find out which program is using that port. There are many small applications that can be used for this. One of them, Currports, is made available on the Automation Engine software DVD, in the folder "Extra".
  2. Open that application. See the column 'local port' and read which program is using port 8083.
  3. Uninstall that program. Example: In one similar case, the program Promise Pegasus was using this port.
  4. Restart the Automation Engine server software. This should solve the problem.

Since v20.x port is 18560 used!

Article information
Applies to

Automation Engine 18



Last revised
Case Number