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DeltaV Explorer error: The server threw an exception

I'm having an issue with DeltaV Explorer when checking Foundation Fieldbus I/O modules.  Please note that I'm running DeltaV version 11.3 on a server with Windows Server Standard (Service Pack 2).  When I browse to all other part of my system, Explorer behaves normally; however once I select any one of my 3 Fieldbus H1 modules, I get the following error:

"An error occurred.

Reason:  The server threw an exception."

From that point on, I receive errors anytime I try to select anything else.  Consistently, the first error is:

"The remote procedure call failed"

Then every subsequent error after that one is:

"The RPC server is unavailable"

I continue getting that error until I close and restart DeltaV Explorer.

Obviously, without DeltaV Explorer, I'm unable to commission or decommission any equipment/instrumentation, so this is of great concern to me.  Any insight provided would be tremendously appreciated!

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