R7 Render Problem?

Whenever I end a render with the red X in the upper right corner of the render window or with the stop button, I get the following message

Server Busy

The action cannot be completed because the other program is busy. Choose “Switch To” to activate the busy program and correct the problem.

Clicking the “Switch To” button causes a window to open with icons for a totally irrevelant collection of apps to appear.

Is this something that I can avoid, or do I just have to keep clicking “Switch To” and waiting for the blinking cursor to appear in the Rhino 7 command line?

Depending on how you are rendering it can just mean that Cycles isn’t ready yet with the current pass. I assume that some passes already have been rendered?

You don’t have to press switch to… just wait.

This should be better in Rhino 8.