Failed to launch workflow on Navigator

When try to launch a workflow from navigator, the error is show as :

The workflow step processor is provided by another web application, and the base URL of the web application is not configured correctly.

Ask your system administrator to update the base URL of the web application where the step processor is registered.

Solutions:

• Check ACCE to set default application with Navigator and set the base server url with http://ICNSERVER:PORT/navigator
• Check the step processor of  workflow definition (sometimes the workflow definition is from workplace, so it should be changed on navigator or other application)