Hi,
If I face such a scenario, I would check whether the window was closed forcefully so that the process gets killed or staled.
To avoid such situations, I will launch the Denodo monitor as a service so that the service will be started and running in the background whenever the system gets started.
You can take a look at the following Knowledge Base Articles for more detailed information about launching Denodo Monitor as a service.
* [**Denodo Monitor as Linux Service**](https://community.denodo.com/kb/view/document/Denodo%20Monitor%20as%20a%20Linux%20Service?category=Operation)
* [**Denodo Monitor as Window Service**](https://community.denodo.com/kb/view/document/Denodo%20Monitor%20as%20a%20Windows%20service?category=Operation)
Hope this helps!