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Unable to connect to Unity simulator Windows 7 64 bit. "This isn't a valid PLC Address, or PLC is busy, or media is off."

Published date: 11 December 2018

When using Win7 OS, the desktop theme can affect the simulator.
Right click on the desktop and go to <Personalize>.
Make sure that you are choosing a Windows 7 Basic theme. Aero or high contrast themes can cause a problem.

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