Teamcity - intermittent clearcase snapshot error - reading changes

Getting the following error in the Project View against projects reading changes from a clearcase snapshot

Error collecting changes for VCS root 'VS Root Name'
jetbrains.buildServer.vcs.VcsException: Process cleartool lshistory -eventid -recurse -    since 22-December-2010.16:42:08 -fmt %u#--#%Nd#--#%En#--#%m#--#%Vn#--#%o#--#%e#--#%Nc#-    -#%[activity]p###----###\n \\server\D$\path\vob returns -1 

jetbrains.buildServer.vcs.VcsException: Error collecting changes for VCS root 'VS Root Name' 
jetbrains.buildServer.vcs.VcsException: Process cleartool lshistory -eventid -recurse -    since 22-December-2010.16:42:08 -fmt %u#--#%Nd#--#%En#--#%m#--#%Vn#--#%o#--#%e#--#%Nc#--#%[activity]p###----###\n \\server\D$\path\vob returns -1 
at     jetbrains.buildServer.buildTriggers.vcs.clearcase.ClearCaseSupport.开发者_如何学PythoncollectChangesWithConnection(ClearCaseSupport.java:622) 
at jetbrains.buildServer.buildTriggers.vcs.clearcase.ClearCaseSupport.collectChanges(ClearCaseSupport.java:612) 

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The simplest way to troubleshoot that kind of error is to execute the same command in a shell sesssion (DOS here), and see the detailed error message that cleartool will produce.
(TeamCity only display the fact that the command has failed)

Possible errors are:

• no albd process on the server where the snapshot view is
• UNC path problem (can you make a simple 'dir \\server\D$\path\vob'?)
• right issue (are you using the right account to query this view)
• ...