"Cannot save to Global.mpt" when exiting Microsoft Project

MORE INFORMATION

• The Global.mpt file is stored on a network share where another user is using the file.
• The Global.mpt file is stored in a read-only network location.
• The Global.mpt file is read-only.

• The current folder
  
  If the user has a shortcut that specifies the "Start In" folder, and if a Global.mpt file resides there, Project opens that Global.mpt file. If the user double-clicks a project in Windows Explorer when Project is not already open, Project uses the Global.mpt file if it is saved in that particular folder,
• The user's profile folder
  
  Project looks in the "Application Data" folder under the user's profile. For example, on a computer that is running Microsoft Windows 98 with User Profiles turned on, this location is as follows:

  \Windows\Profiles\Username\Application Data\Microsoft\MS Project

  On a computer that is running Microsoft Windows 2000, the user profile is located in "Application Data" folder.
• The user's profile language folder
  
  This folder is the language ID subfolder in the "Application Data" folder for the user profile. For example, on a computer that is running Windows 98 with User Profiles turned on, this folder is typically found in the following location if the user's language is English:

  \Windows\Profiles\Username\Application Data\Microsoft\MS Project\1033

• The folder where the Winproj.exe file is located
  
  By default, the Project application is installed in the following folder:

  \program files\Microsoft Office\Office

• The Winproj.exe language folder
  
  By default, this folder is found in the following location:

  \program files\Microsoft Office\Office\1033

  If Project opens the Global.mpt file from this location, Project does not save changes to this copy. Instead, Project saves them to the profile language folder. By default, Project opens the Global.mpt file from this location the first time Project is started.
• If the Global file is not found in any of these locations, Microsoft Windows Installer starts and tries to restore a copy to the Winproj.exe language folder.
• If Windows Installer is unable to restore a copy of the Global.mpt file, Project displays a message that states that it will create a new Global.mpt file that is missing some items.