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While using ADI-EagleEye-PeopleCount-BoardandFirmwareTestTool on PC and with EagleEye Trial kit, why is it showing "More than one device discovered for my Eagle Eye device.Remove device" ?

For my Eagle Eye device , when i try to use ADI-EagleEye-PeopleCount-BoardandFirmwareTestTool from Trail kit to update some options showing "More than one device discovered.Remove device", even only one device connected to pc.