Unable to load repository, problem with mapping

Hello,

we have a project that is somehow corrupted.
Whenever any of us tries do load this project to our repository workspace we get following error :

Failure mapping project LibABC : Error removing nature from project:com.ibm.team.filesystem.rcp.core.provider
Failure mapping project LibABC : Error removing nature from project:com.ibm.team.filesystem.rcp.core.provider

After that project seems to be loaded OK but new Eclipse project is created with name "ABC", not "LibABC" as it is on server.

Please help, I am terribly frustrated

Thanks
Zbynek