Checking out an element exports a copy of the selected element from the Version Control Bank and then imports it into the System Modeler, where you can modify it. When you check out a file, it is reserved under your userid.
To remove the reservation on an element, the TFS Administrator must undo the checkout performed by another user. This can be easily done by a command line utility available with Team Explorer. The command line can be accessed by launching the Visual Studio Command Prompt window. Refer to the MSDN documentation for using the TFS command line .
You can then remove the reservation on the file by using the Reservation Tab. Refer to Reservation Tab for more information.
Any load errors that you encounter during check out are written to the Visual Studio Source Control Output Window.
To check out an element, perform the following:
Select the element(s) in the Solution Explorer or Class View window.
Select File, Source Control, Check Out <version file name> menu item, or Check Out from the context menu. The element is checked out and the status icon changes from a lock to a red tick mark.