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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'>Hi all<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'>I am trying to create a cylinder (with a hole) made up of two parts. Without extrusion, when it is meshed 2D, everything is OK however, when I extrude one of the surfaces, other half becomes deleted. Does not matter which half extruded first, the result is not what I want. I attached the geo file.</span><o:p></o:p></p></div></body></html>