MoveClient instructions unclear

I am trying to convert all my entries on SEPM12 to computer mode. After reading the PDF and a few articles I am still getting the following error:

########################################################################
# Begin MoveClient        15/09/2014 3:15:00 PM
########################################################################
::Temp Group for this run: Default Group
        ::Success
    ::Root Group Name: 
    ::Domain Name: %
    ::DomainID: 
        ::Success
    ::Get Temp GroupID: 
        ::Success
    ::Get NewUSN: 
        ::Success
15/09/2014 3:15:00 PM : Start structure metadata Query
    ::Get group structure metadata
        ::Failed: 
Missing settings file: IPgroups.txt
Missing settings file: Hostgroups.txt
Missing settings file: Usergroups.txt
Missing settings file: OSgroups.txt
    ::Processing SwitchClientGroups.txt
    ::ToComputer -|- % -|- Professional Services\Workstations
    ::Checking for clients to switch in group \Professional Services\Workstations
        ::Failed to retrieve client list from database.
########################################################################
# End MoveClient        15/09/2014 3:15:01 PM
########################################################################

It is not clear to me how to set the group for conversion within the SwitchClientGroups.txt file or if I need to alter the Dim TempGroupName : TempGroupName = "Default Group" setting.

At the moment the only entry I have in the SwitchClientGroups.txt is:

ToComputer,Professional Services\Workstations

For reference, if you look at my clients tree in SEPM for this branch (there are actually 30 odd branches under My Company"), it is:

My Company -> Professional Services -> Workstations

Any help would be appreciated.