Automatic checkout during a Save operation

It is a good practice to check out files out before you edit them. However, if you edit a file within the Rational Software Development Platform that is under source control but is not checked out, WebSphere Studio checks out the file if Automatically checkout is the current setting of the When checked-in files are saved by an internal editor preference

Attention: If you are using a shared branch in a dynamic view, the automatic check out process could create a potential conflict. While you are editing a file that is not checked out, another project team member can check out, edit, and check in the same file before you attempt to save it. When you save the file, the automatic check out process silently checks out the latest version of it and when you check in the file, your edits overwrite the previous edits made by the other team member. To avoid problems, always check out files before editing them.

Related concepts
When checked-in files are saved by an internal editor