Good afternoon,
I thought that this issue was related to the one posted by Gareth Lovell about a communication error, but reading more closely I’m thinking it might be different. After downloading 8.3 I had no issues with any of my simulated devices, and now as of this week I have noticed that I can not connect to any of the simulated devices, even new ones that I have just created. The error I am getting is “CreateMonitoredItems failed: Bad_InvalidState: The operation cannot be completed because the object is closed, uninitialized or in some other invalid state.” It is on all of the tags in every simulated device that I have in any of my projects. Not sure if its similar to the error that Gareth is experiencing or not, but I figured I would post about it. As a side note I only have simulated devices in our system so obviously it isn’t impacting anything in production.