Warning - Bad Arc - Press F5

This can be caused by two different issues.

The POST Processor of the CAM Package is using Incremental Arcs or Absolute Arcs, and the control software is expecting the other.

Fix 1:

Have the Post Processor Modified to add the following codes at the top the G-Code.

% - Incremental Arc Centers

$ - Absolute Arc Centers

Fix 2:

Goto the Setup Menu -> Run Settings

Toggle the Check Box Arc Centers Incremental

This should resolve the issue.