Cause : No velocity has been programmed in Automatic mode comes when the decoded NC block needs a path or axis velocity.

1. When using linear interpolation with path velocity (G01), a path velocity must be defined with F.
2. When using chaining with axis velocity (G77), the axis velocities must be defined with FX, FY, etc.
3. When using roll feed with axis velocity (G01), the velocity must be defined with F.