No problem, last one for today though....it's getting late over here and I desperately need my beauty sleep
You can download your corrected project
here
To see where you were going wrong you need to understand that the Waterline roughing operation only actually machines the workpiece.......
You can see this if you run SprutCAM, don't import a model but go and create a Waterline roughing operation. Click on Workpiece, select 'Box - from centre point', enter LX
10 LY
5 LZ
-2 and now click run, you will see that a toolpath is calculated to machine it all away.
Ok, now if we add a model into the equation then SprutCAM
machines the workpiece, but
avoids the model.
Because you had selected only a few faces as your model for machining, and SprutCAM calculated a workpiece based on the extremeties of the faces you had selected (Blue wireframe) it tried to machine all of the workpiece less your selected faces.
As you will see in the modified project I have added the whole model in for machining and I have used a curve restriction to keep the machining inside the cavities.
I created the curve for the restriction by using the 'Project' function (3D Model).
Dave