error ID 8390 & 8391

Hi all,

I'm using EV 9.0.2.

I have a problem with a mailbox.

it stops to archive since 4 weeks with the error:

An attempt was made to move an ArchiveFolder beneath itself (hierarchy inversion)

ID 8390 and 8391.

The Dtrace reported this:

685396 12:10:19.718  [7480] (ArchiveTask) <7224> EV:L {CFolderHelper::GetFolderSettings:#877} Okay to synchronise folder [CHIAMATE].
685397 12:10:19.718  [7480] (ArchiveTask) <7224> EV:L {CFolderHelper::GetFolderSettings:#909} Parent folder of [CHIAMATE] exists so do the sync now.
685398 12:10:19.718  [7480] (ArchiveTask) <7224> EV:M CFolderHelper::UAFR() - Updating folder record 16685B0936928F12ABF1110000evsite|DisplayName = CHIAMATE|FolderPath = �Posta in arrivoCHIAMATE|ParentFolderVEID = 16685B0936928F12ABF1110000evsite|RetentionCategoryID = (null)|ExistsAtSource = True
685400 12:10:19.718  [7480] (ArchiveTask) <7224> EV:L CBaseDirectoryServiceWrapper::CreateDirectoryService() - Entry [m_nNumTries = 40]
685401 12:10:19.718  [7480] (ArchiveTask) <7224> EV:L CBaseDirectoryServiceWrapper::CreateDirectoryService() - Successfully communicated with an EV Directory Service on the local machine
685402 12:10:19.734  [3800] (DirectoryService) <336> EV~E Event ID: 8391 The EnterpriseVault.DirectoryService object reported an error.| |An attempt was made to move an ArchiveFolder beneath itself (hierarchy inversion)| |
685405 12:10:19.750  [7480] (ArchiveTask) <7224> EV:H CFolderAgent::UpdateArchiveFolderRecord() - HRXEX fn trace : Error 0xc0041bf0, ..\AgentsCommon\FolderHelper.cpp [lines {2374,2405}], built Mar 14 10:54:45 2011.
685406 12:10:19.750  [7480] (ArchiveTask) <7224> EV:M CFolderHelper::UAFR() - Error updating record 16685B0936928F12ABF1110000evsite, error = 0xC0041BF0|Internal:CFolderAgent::UpdateArchiveFolderRecord() ..\AgentsCommon\FolderHelper.cpp [lines {2374,2405}], built Mar 14 10:54:45 2011
685407 12:10:19.750  [7480] (ArchiveTask) <7224> EV:H CFolderHelper::GetFolderSettings - HRXEX fn trace : Error 0xc0041bf0, ..\AgentsCommon\FolderHelper.cpp [lines (16){...,442,502,792,793,806,807,808,809,810,811,812,910}], built Mar 14 10:54:45 2011.
685408 12:10:19.750  [7480] (ArchiveTask) <7224> EV:L :CArchivingAgent::PF_SetFilterAndRetention() |Using the filter applied to the current folder CHIAMATE |
685409 12:10:19.750  [7480] (ArchiveTask) <7224> EV:L :CArchivingAgent::PF_SetFilterAndRetention() |The VaultId value applied to the folder CHIAMATE is (null) |
 

Does anybody have any suggestions?

thanks in advance

Davide