Limited Effect of an Exclusive File Lock

Exclusive file locking does not freeze an element completely:

Exclusive file locking does not prevent any user from modifying any file with a text editor or IDE. AccuRev encourages users in serial-development-mode workspaces to ask permission first: it maintains files in a read-only state, and makes a file writable when a user executes a co or anchor command on it. But users can modify a file without asking permission, by changing the access mode (UNIX/Linux: chmod command, Microsoft Windows: attrib command or Properties window) and then editing it. Such unauthorized changes can’t be sent to the AccuRev depot, though: the exclusive file lock disallows a co, anchor, or keep.