--- /dev/null
+# Lighter case to reproduce problem of #1995
+# The problem was in axis that contained sub-shapes naming of the sketch and the extrusion becomes
+# use this axis. So, on remove of the axis, the naming is failed. Same for modifications of the sketch 1.
+
+from salome.shaper import model
+
+model.begin()
+partSet = model.moduleDocument()
+Part_1 = model.addPart(partSet)
+Part_1_doc = Part_1.document()
+Sketch_1 = model.addSketch(Part_1_doc, model.defaultPlane("XOY"))
+SketchLine_1 = Sketch_1.addLine(175.5289977047663, 37.215818549061, -134.623385345167, 37.215818549061)
+SketchLine_2 = Sketch_1.addLine(-134.623385345167, 37.215818549061, -134.623385345167, -108.7867760111381)
+SketchLine_3 = Sketch_1.addLine(-134.623385345167, -108.7867760111381, 175.5289977047663, -108.7867760111381)
+SketchLine_4 = Sketch_1.addLine(175.5289977047663, -108.7867760111381, 175.5289977047663, 37.215818549061)
+SketchConstraintCoincidence_1 = Sketch_1.setCoincident(SketchLine_4.endPoint(), SketchLine_1.startPoint())
+SketchConstraintCoincidence_2 = Sketch_1.setCoincident(SketchLine_1.endPoint(), SketchLine_2.startPoint())
+SketchConstraintCoincidence_3 = Sketch_1.setCoincident(SketchLine_2.endPoint(), SketchLine_3.startPoint())
+SketchConstraintCoincidence_4 = Sketch_1.setCoincident(SketchLine_3.endPoint(), SketchLine_4.startPoint())
+SketchConstraintHorizontal_1 = Sketch_1.setHorizontal(SketchLine_1.result())
+SketchConstraintVertical_1 = Sketch_1.setVertical(SketchLine_2.result())
+SketchConstraintHorizontal_2 = Sketch_1.setHorizontal(SketchLine_3.result())
+SketchConstraintVertical_2 = Sketch_1.setVertical(SketchLine_4.result())
+model.do()
+Axis_4 = model.addAxis(Part_1_doc, model.selection("FACE", "Sketch_1/Face-SketchLine_1f-SketchLine_2f-SketchLine_3f-SketchLine_4f"), model.selection("VERTEX", "Sketch_1/Vertex-SketchLine_3s-SketchLine_2e"))
+Extrusion_1 = model.addExtrusion(Part_1_doc, [model.selection("FACE", "Sketch_1/Face-SketchLine_1f-SketchLine_2f-SketchLine_3f-SketchLine_4f")], model.selection(), 50, 0)
+Sketch_2 = model.addSketch(Part_1_doc, model.selection("FACE", "Extrusion_1_1/Generated_Face_2"))
+SketchCircle_1 = Sketch_2.addCircle(12.88847795756506, 28.93359954982685, 11.55225986344597)
+model.do()
+
+# now remove axis to destroy naming structure if extrusion refers to it
+Part_1_doc.removeFeature(Axis_4.feature())
+# also update sketch_1 to launch recomputation of everything
+SketchLine_1.setStartPoint(170, -130)
+model.end()
+
+import ModelAPI
+assert(ModelAPI.ModelAPI_Session.get().validators().validate(Sketch_2.feature()))
