Using Siebel Tools > Checking Out and Checking In Projects and Objects >
Guidelines for Check Out and Check In
Before checking out or checking in projects or objects, consider the following:
CAUTION: Depending on the size of the project, the check-in process might require some time. Do not interrupt the process, as doing so can leave your repository in an unstable state. If for any reason the check-in process is interrupted, you must perform it again to complete any unfinished tasks and unlock the projects on the server.