Solution
NI Server Explorer is a free-to-use OPC Client Application but has been obsoleted. Therefore, NI is not actively monitoring, documenting, developing and supporting this OPC Client Application. NI Server Explorer is only compatible with Windows 7 and Windows XP. If you would like to access Shared Variables on your OPC server, it is highly recommended to use OPC Quick Client that ships with the LabVIEW DSC Module. Please visit
this link to know how to access Shared Variables from the OPC Quick Client. You can also use other third-party OPC Client Application that are available on the market.