Hi everyone,

(This is a repost from the German forum, where it hasn't had a reply yet — reposting here since the English section may reach more people.)

I'm developing a PythonPart that generates the reinforcement and the associated sections for a specific wall. For the horizontal sections I would like them to be created as a view from below (soffit), the same way our formwork plans show them.

I'm working in Allplan 2024.

I create the sections programmatically through AllplanBasisElements.CreateSectionsAndViews, building the SectionDefinitionData myself. To switch the horizontal cut to a view-from-below, I tried ClippingPathProperties.SectionType with the eHorizontalFromBelow enum value, but the setting has no visible effect — the generated section looks exactly like a normal top-down horizontal section.

This is roughly how I set the property (reduced to the essentials):

import NemAll_Python_BasisElements as AllplanBasisElements
import NemAll_Python_Geometry      as AllplanGeo

# --- ClippingPathProperties ---
clip_prop = AllplanBasisElements.ClippingPathProperties()
clip_prop.IsHeightFromElementOn = False
clip_prop.SectionIdentifier     = str(section_id)
clip_prop.BottomLevel           = bottom_level
clip_prop.TopLevel              = top_level

# This is the part that has no effect — trying to make it a view-from-below:
clip_prop.SectionType = AllplanBasisElements.ClippingPathProperties.SectionType_Enum.eHorizontalFromBelow
# also tried the plain integer (same enum value):  clip_prop.SectionType = 3

# --- SectionDefinitionData ---
section_definition = AllplanBasisElements.SectionDefinitionData()

def_prop = AllplanBasisElements.SectionDefinitionProperties()
def_prop.ClippingPathProperties         = clip_prop
section_definition.DefinitionProperties = def_prop
section_definition.ClippingPath         = clipping_path            # rectangular polyline around the wall
section_definition.DirectionVector      = AllplanGeo.Vector3D(0, 0, -1)

# section element then passed to AllplanBasisElements.CreateSectionsAndViews(...)

For reference, the enum from NemAll_Python_BasisElements.pyi:

class SectionType_Enum(enum.IntEnum):
    eVertical            = 1
    eHorizontalFromAbove = 2
    eHorizontalFromBelow = 3

I also tried setting SectionDefinitionData.HeightDirection to Vector3D(0, 1, 0) and (0, -1, 0), which made no difference either.

One more thing I noticed: I can't read the value back to confirm it's actually stored. The setter raises no exception, but the getter of

ClippingPathProperties.SectionType

Boost.Python.ArgumentError: Python argument types in
    None.None(ClippingPathProperties)
did not match C++ signature:
    None(class ClippingPathProperties_Base {lvalue})

So I can't verify whether the value reaches the object at all.

My questions:

Is ClippingPathProperties.SectionType the correct way to produce a view-from-below horizontal section through the PythonPart workflow in Allplan 2024, or am I setting it in the wrong place?
If SectionType is not the intended mechanism, what is the supported way to get a soffit for a programmatically created horizontal section?
Is the non-working getter on SectionType a known issue?

Any pointers would be much appreciated. Thanks!