The "Cannot close ..." dialog appears when XShutdown encounters a non-Presentation Manager (PM) session. This includes OS/2 and DOS text sessions and Win-OS/2 sessions, be they full screen or windowed.

Since there is no predefined way of how to close such sessions, XShutdown prompts for an action here. The following actions are available:

Note that neither of these methods will save the data of the session. If you wish to have the data of a certain session saved, save the data of the session's application and close the window yourself now, which will also cause XShutdown to continue.

If the "Store these settings..." flag is checked, XShutdown will remember the selected action for all future sessions which carry this title. Checking this setting will add this session title to the list of auto-close items which are available in the "Auto-close details" dialog on the "XShutdown" page in the desktop's settings notebook.