Unable to browse tags in opcwatchit

Dear All,

I encountered a problem related to  opcwatchit

I am using delta v version 11.3.1.

I have 1-Engineering Station, 1-Operator station, 1-Engineering Station *** operator station, 1-OPC and Five MD+ controllers

My dcs controllers D1 and D2 showing bad. And ESD controllers E1,E2 and E3 showing good. In the OPC diagnostics but if I checked the same on other station it shows all the controllers are showing good please suggest me the solution to resolve this problem.

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