Thank you for the response,
I will try to explain a bit more: I`m creating the circular area reinforcement, making a section through it and them i would like to label each rebar that is in the section, when I`m doing this, Allplan says No placement found for position number 1. The position exists and I can create the label with the label function from Allplan (See the second picture - this is what I would like to create)

for creating the reinforcement:

def create_reinforcement(self):
        """
        Create the circular reinforcement
        Returns: created reinforcement
        """

        rotation_axis = AllplanGeo.Line3D(AllplanGeo.Point3D(0, 0, 0),
                                          AllplanGeo.Point3D(0, 0, self.h_1))

        contour = AllplanGeo.Polyline3D()
        contour += AllplanGeo.Point3D(self.r_1, 0, self.h_1)
        contour += AllplanGeo.Point3D(self.r_2, 0, self.h_1)

        circular_area = AllplanReinf.CircularAreaElement(1, 28,5, 5,
                                                         rotation_axis, contour,
                                                         0,
                                                         360,
                                                         0,
                                                         360,
                                                         -55, -55, -55)

        circular_area.SetBarProperties(250, 11900, 1000,
                                       1,
                                       12000, 12000,
                                      0, 10000)

        circular_area.SetOverlap(1000, 0, True,
                                 0, 1000, True,
                                 1000)


        return circular_area

and for labeling:

 [...]
            label_point = AllplanGeo.Point2D(3*self.r_1, 0)

            pos_nr = AllplanReinforcement.ReinforcementUtil.GetNextBarPositionNumber(self.document)


            label = AllplanReinforcement.ReinforcementLabel(
                reinforcementType = AllplanReinforcement.Bar,
                type              = AllplanReinforcement.LabelType.LabelWithFan,
                positionNumber    = pos_nr,
                labelProp         = label_prop,
                labelPoint        = label_point,
                angle             = AllplanGeo.Angle())

            labels = AllplanReinforcement.ReinforcementLabelList()

            labels.append(label)

            sect_ele = AllplanBasisElements.ViewSectionElement()

            # placement point is bottom left point of the from the section path body in the view

            view_props.PlacementPoint  = right_view_place_pnt
            view_props.PlacementAngle  = math.radians(0)


            sect_ele.GeneralSectionProperties = view_props
            sect_ele.ViewMatrix               = RotationAngles(-90, 0, 0).get_rotation_matrix()
            sect_ele.TextElements             = [view_label]
            sect_ele.ReinforcementLabels      = labels

I check the labeling script for bars that are placed with LinearBarBuilder.create_linear_bar_placement_from_to_by_dist and it worked.

Thank for the answer, I was guessing this might be the case.
Then in my case, how could I try to label those rebars, because this is taking a big amount of time to do it manually and is very laborious. From the manual, I understand that a label needs a BarPlacement and a UVS. Since my BarPlacement is missing what can I try?
I attached a example of a drawing that I need to create.

Thank you again for the help!