Use this Rational ClearCase preference option to specify ClearCase behavior when you attempt to save a WebSphere Studio file that is not currently checked out of ClearCase.
Select Automatically checkout if you want ClearCase to automatically check the file out without notifying you. The automatic check out process is necessary to accomplish WebSphere Studio operations such as refactoring. Select Do nothing if you do not want ClearCase to automatically check the file out when it detects that the file you are trying to save is not checked out.
Note that you cannot change the activity that is associated with the file during the automatic checkout. To change the activity associated with a file, you must explicitly check the file out of ClearCase.
Warning: If you are using a shared branch within a dynamic view, the automatic check out process could create a potential problem. While you are editing a file that is not checked out, another project team member could check out, edit, and check in the same file before you attempt to save it. When you save the file, the automatic check out procedure will silently check out the latest version of it and when you check the file back in, your changes will overwrite the previous changes made by another project team member and you may not know it. Therefore, if you are using a shared branch within a dynamic view, you must check out files before editing them.
When check-in files are edited by an internal, interactive editor
When check-in files are edited by an internal, non-interactive editor