Freeze using ressources

Hellousers of the company use inotes.

we have a navigator which permits to reach the mail DB et the ressources DB.

When they click on ressources DB, they can navigate and use it in another explorer window.

When they select the “agenda” view, the agenda view is opened, they can work on it.

But when they want to close the ressource window by clicking on “close” in the menu at the left top of the window, the window is well closed but the windows which contains the main navigator is frozen.

They can not click anywhere.

To close this windows they have to use the task manager.

Do you know the problem?

thank you for your help.

regards

Christelle