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Cannot connect to either a M340 or Quantum PLC with Unity 11.1 running in VMWare after updating to Unity 11.1

Goals and Symptoms
Unity fails to connect to the either a M340 or Qunatum PLC after updating to Unity 11.1 

Facts and Change
Unity, M340

Causes and Fixes
Attempts to to connect to either a Quantum or M340 after updating to Unity 11.1 from Unity 11, could fail if it is installed in a VMware workstation PC..  
Prior to updating to Unity 11,1 the problem did not occur.

The following can be used as a workaround.
  • Uninstall the PLCUSB Driver X64 that was installed by Unity 11.1 until a new driver is available.


 
  • Insert the Unity 11.0 CD
  • Open the folder named 'Communications Drivers'.


 
  • Double click on the file named 'SchneiderPLCUSBDriverSuite' to install the driver.


 
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