WinCVS question - add selection

[Lisa]

This morning I am attempting to replace a file in CVS that someone deleted.  When I hit the "add selection" I recieved the following error message:   cvs add glossary.html (in directory C:\Project\documentation\doc\Glossary) cvs server: glossary.html added independently by second party *****CVS exited normally with code 1*****   Anyone have any clue what this means??  I've checked some of the documentation I have, and the sites but can find no reference to this type of error. Lisa