Correcting unlinked activities
If the problem is the result of one of the most likely scenarios, use the cleartool checkvob command with the –ucm option to restore the project to a consistent state. For more information about using this command, see DevOps Code ClearCase Administrator's Guide and DevOps Code ClearCase Command Reference.
If the problem is caused by DevOps Code ClearCase® MultiSite, at the remote site, link the unlinked activities.