Stock reconciliation

Hi friends I am having problem with stock reconciliation.

A customized report has been run every day to close the previous day inventory. Now There is a discrepancy when the report is run at 12.00 pm and 2.50 pm. I checked with MB5Band MB51 & there was no movement taken place between that stated time. May I know other way to find out the reason of variation when the same report run at two time for the same day.

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manickss