Tutorial - splitting surfaces using Split line in SolidWorks?

Here is the Tutorial.
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Step 1:
Open the Attached file in SolidWorks or generated a similar surface.
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Step 2:
Top plane>>Sketch.
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Step 3:
Make the sketch using Spline. Be sure that the sketch is larger than surface.
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Step 4:
Exit the sketch. Now under features tab choose curves>>split line.
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Step 5:
Select the sketch and curve to project the split line.
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Step 6:
Click OK and we can see that the surface was splitted into two parts.