hi, i expected the feature of split face by two points also works for face of solid body but it seems not as result models did not changes. This purpose to generates fully structured quads of surface bases and hexahedral by extrusion or sweep as given example below, refinement in number element trough thickness also. I’m not really know is this current limitation or something not working properly since a face and point is selectable and successes defined shown in textbox menus.
It works with solids too:
It seems that you even used it this way here: Adding a feature to split edges of geometry - #5 by synt
So it just doesn’t work in the case of a tube, maybe because of the seam edges.
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right it shown work properly, few examples have all straight edge, but it may not for all edges are curved.
tested on mixed of straight and curved edges also work as expected in latest stable versions (v2.4.0)
Yeah, it seems that seams are the problem 
It can’t split here using vertices from seam edges:
but it can split on the other side where the edges were introduced manually via partitioning:
Result:
What’s interesting, it splits on the seam side too.
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right, prepare partition in CAD is working in splitting surface. Automatic split periodic faces by PrePoMax is a bit different even visually the same.
'*edited/updates
i correcting my previous comment: it seems the problem only in update display graphics at first operations, continue to operate or repeat split commands will updating. Maybe selection of first and second point also effecting, it starts from larger ones.
Unfortunately, latest development versions not working at selecting point. Hope this problem is fixed to be work as previous versions due to usefulness in generating structured quad/hexahedral element and controlling number of element trough thickness, thank you.
I usually have this setting disabled because it sometimes breaks imports.
Right, something is off, apparently since 2.4.5:
cylinder split faces.zip (2.7 KB)
The split function is really a primitive one that uses the OpenCascade geometry kernel. It uses two 3D points and sometimes cannot find the intersection. Sometimes it just does not work. But I will look into the selection issue.
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thank you for looking into the problems, split face of solid is in CAE domains specifically for FE meshing. Many CAD not supported or not easy to define since out of their interest probably, even some do cleanup by remove extra face or edge during export the parts. More support this operation can be useful for meshing purpose e.g split edge by two, draw new line/edge from one point to perpendicular to existing edge, copy or offset edge at some plane also.
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