When I try to sync thefiles using file manager under admin menu I get the following error

AssemblyVersion: 03.03.07
PortalID: 0
PortalName: Hunter Valley Venturers
UserID: 1
UserName: host
ActiveTabID: 46
ActiveTabName: File Manager
RawURL: /Admin/FileManager/tabid/46/Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://www.huntervalleyventurers.net/Admin/FileManager/tabid/46/Default.aspx
UserAgent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: dba3d3c0-b604-476b-9052-b897f2c644ea
InnerException: Object reference not set to an instance of an object.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Services.FileSystem.FolderController.UpdateFolder
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Services.FileSystem.FolderController.UpdateFolder(FolderInfo objFolderInfo) at DotNetNuke.Services.FileSystem.FolderController.UpdateParentFolder(Int32 PortalID, String FolderPath) at DotNetNuke.Common.Utilities.FileSystemUtils.RemoveOrphanedFolders(Int32 PortalId) at DotNetNuke.Common.Utilities.FileSystemUtils.SynchronizeFolder(Int32 PortalId, String physicalPath, String relativePath, Boolean isRecursive, Boolean syncFiles, Boolean forceFolderSync) at DotNetNuke.Modules.Admin.FileSystem.FileManager.lnkSyncFolder_Command(Object sender, CommandEventArgs e) at System.Web.UI.WebControls.LinkButton.OnCommand(CommandEventArgs e) at System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) at System.Web.UI.Page.ProcessRequestMain() --- End of inner exception stack trace ---
Source:

if I use the file manager under Host then it is ok.

If I export an template then I get a similar error

can any one shed some light on this

I am at a loss to know what is causing it.

you were right - in the folders table there was a reference to a folder 426 in the gallery folder which should have been 406 - how it got the entry is unknown.

However I would have assumed that when you did a sync the database would be sync'ed to the actual folders ie delete any files/folder referenced in the table that no longer exist and then rebuild the files and folder tables with the files and folders that actually exist.

Thus if a client uses say ftp to move files etc to the server or uses ftp to delete files folders then the sync function would simply rebuild the tables to match the actualphysical layout of the portal directories.