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On starting a protected Java application, the message "VM Verification failed!" appears. What can I do?


The signature for the Java Virtual Machine (JVM) that is used by the application is missing. By accepting the message, the signature file is automatically updated from the web.

Alternatively, you can download and save the signatures manually. Please proceed as follows:

  • Download the signatures at
  • Save the downloaded archive file WibuVm.jar in the CLASSPATH of your Java application. This can be done e.g. by saving the file in the lib\ext directory of the Java Runtime, e.g. %Program Files (x86)%\Java\jre6\lib\ext\.
  • Restart the application.