Installer 10.5 | Complete Installation and Upgrade Information for Software AG Products | Upgrading Software AG Products On Premises | Critical Factors and Requirements for Successful Upgrade | My webMethods Server Requirements | Environment Variable
 
Environment Variable
In your old release, you might have identified a default My webMethods Server installation in the global path of the installation’s host machine using the environment variable WM_HOME. If you are going to install the new release on the same machine as the old release, the existence of this variable could cause problems, so you must remove the environment variable from the global path.
Do not redefine the environment variable after installing the new My webMethods Server.