Folders are handled fundamentally different from ordinary files by CVS. They are not under revision control, i.e. you cannot tell which folders existed in the project at a certain time. Furthermore, folders can never be explicitly removed (expect by removing them directly in the repository).

As a substitute, CVS follows the convention that a folder is "non-existent" in a version of the project if it is empty. This convention can be enforced by using the option -P to cvs update and cvs checkout. This option can be set in the menu Settings->Prune Empty Folders on Update.

A folder can be added to the repository choosing File->Add to Repository... or right clicking the marked folder and choosing Add to Repository... from the pop-up menu. Note that in contrast to adding files, adding folders does not require a commit afterwards. Cervisia issues the command

cvs add dirname