I see that no one ever replied to this thread. There are some similar discussions about the 1.2.83 release, and we have updated the release notes to indicate that the vCPU check during simulation launch is new in this release. You probably need to increase the vCPU Overcommit Value in the UWM.
Make sure all of your current running simulations are stopped. If you shut down VM Maestro without first shutting down your simulation then you can experience an issue like this.
- In VM Maestro select Stop Multiple Simulations from the Simulations menu in the toolbar
- Click this before exiting VM Maestro the next time:
But you may just have to restart the VIRL server