https://community.graphisoft.com/t5/Libraries-objects/one-part-of-the-wall-vanishes-why/m-p/242638#M5107 It looks like the Wall has been cropped by the Roof or trimmed by the Roof's Trimming Body.<BR /> <BR /> Did you use the Crop to Single-Plan Roof command on the Wall?<BR /> <BR /> Or did you use the Trim Elements to Roof/Shell command on the Wall? Sat, 04 Nov 2017 20:34:35 GMT Laszlo Nagy 2017-11-04T20:34:35Z https://community.graphisoft.com/t5/Libraries-objects/one-part-of-the-wall-vanishes-why/m-p/242637#M5106 <DIV class="actalk-migrated-content"><T>Hello.<BR /> I do not know what happens to this wall, but its part under the roof vanishes, both in 3D (as in the attached picture) and in section. <BR /> I should add the wall is clear of any intersections.<BR /> Is it a problem of priority?<BR /> Thank you.</T></DIV><BR /><IMG src="http://community.graphisoft.com/t5/image/serverpage/image-id/71108iF60115DAC000DF72/image-size/large?v=v2&amp;px=999" border="0" alt="wall vanishes.jpg" title="wall vanishes.jpg" /> Fri, 03 Nov 2017 12:11:26 GMT https://community.graphisoft.com/t5/Libraries-objects/one-part-of-the-wall-vanishes-why/m-p/242637#M5106 Anonymous 2017-11-03T12:11:26Z https://community.graphisoft.com/t5/Libraries-objects/one-part-of-the-wall-vanishes-why/m-p/242638#M5107 It looks like the Wall has been cropped by the Roof or trimmed by the Roof's Trimming Body.<BR /> <BR /> Did you use the Crop to Single-Plan Roof command on the Wall?<BR /> <BR /> Or did you use the Trim Elements to Roof/Shell command on the Wall? Sat, 04 Nov 2017 20:34:35 GMT https://community.graphisoft.com/t5/Libraries-objects/one-part-of-the-wall-vanishes-why/m-p/242638#M5107 Laszlo Nagy 2017-11-04T20:34:35Z https://community.graphisoft.com/t5/Libraries-objects/one-part-of-the-wall-vanishes-why/m-p/242639#M5108 Hello and thank you for your reply.<BR /> No, I don't think I did. I almost never do. What I usually use is Connect &gt; Subtract. But, even if I had used these commands, shouldn't they have been cancelled by the Cancel all connections command, which I am sure I used for the wall in the very end?<BR /> Thank you. Mon, 06 Nov 2017 09:02:31 GMT https://community.graphisoft.com/t5/Libraries-objects/one-part-of-the-wall-vanishes-why/m-p/242639#M5108 Anonymous 2017-11-06T09:02:31Z https://community.graphisoft.com/t5/Libraries-objects/one-part-of-the-wall-vanishes-why/m-p/242640#M5109 I have had walls in projects moved from earlier versions which seem to randomly inherit cropping. If you have cleared all connections and you are sure there are no priority issues then it may be cropping as Lazlo suggests. Cropping seems to be unfavourably buried in the menus especially removing cropping. Perhaps its days are numbered, but this may help...<BR /> <BR /> <A href="https://helpcenter.graphisoft.com/guides/archicad-21/archicad-21-reference-guide/elements-of-the-virtual-building/construction-elements/roofs/crop-elements-to-single-plane-roof/#XREF_28424_Undo_Roof_Trim" target="_blank"><LINK_TEXT text="https://helpcenter.graphisoft.com/guide ... _Roof_Trim">https://helpcenter.graphisoft.com/guides/archicad-21/archicad-21-reference-guide/elements-of-the-virtual-building/construction-elements/roofs/crop-elements-to-single-plane-roof/#XREF_28424_Undo_Roof_Trim</LINK_TEXT></A> Mon, 06 Nov 2017 10:32:27 GMT https://community.graphisoft.com/t5/Libraries-objects/one-part-of-the-wall-vanishes-why/m-p/242640#M5109 DGSketcher 2017-11-06T10:32:27Z