Here is a list of problems which do not fit into the above categories. They are in no particular order.
On Windows, if there is a 30 second or so delay when you run a cvs command, it may mean that you have your home directory set to C:/, for example (see HOMEDRIVE and HOMEPATH in 附录 D). cvs expects the home directory to not end in a slash, for example C: or C:\cvs.
If you are running cvs 1.9.18 or older, and cvs update finds a conflict and tries to merge, as described in 冲突示例 在 第 10 章, but doesn't tell you there were conflicts, then you may have an old version of rcs. The easiest solution probably is to upgrade to a current version of cvs, which does not rely on external rcs programs.