RS Error Message "Access Violation..."

I ran RegSupreme Version 1.4, and it identified 6272 problems. I selected 571 and clicked the fix button. After setting up the recovery file, it proceeded to fix or remove the items. When it finished the process the following error message came up:

The Message Returned each time I clicked the OK or X box. I finally used Task Manager to End Task and regain control of the system.

Can you tell me what this indicates and if it is a bug you know of.