MIM stage deletion failed (code)

                If 1 = SW_Connectors And StudConnectors = 0 Then

                    Dim SW_csentry As CSEntry = SW_MA.Connectors.ByIndex(0)
                    SW_csentry.Deprovision()

it works most of time but there are a few failures happened like below:

2 objects deleted in Metaverse by the code but only 1 of them is deleted when export profile run.

there is no relevant error/warning in the event viewer. 

any suggestion/advise would be very much appreciated.