https://community.graphisoft.com/t5/Installation-update/Normal-vector-amp-edge-1152-is-not-perpendicular-in-pgon-543/m-p/208561#M22045 <DIV class="actalk-migrated-content"><T>One of my work mates keeps getting this error when she goes from ground floor to the 3d Generic Perspective window.<BR /> <BR /> does any one have a clue what it could be?</T></DIV><BR /><IMG src="http://community.graphisoft.com/t5/image/serverpage/image-id/73286i2620D8127C416A35/image-size/large?v=v2&amp;px=999" border="0" alt="vector.JPG" title="vector.JPG" /> Sun, 27 Nov 2011 23:29:09 GMT Anonymous 2011-11-27T23:29:09Z https://community.graphisoft.com/t5/Installation-update/Normal-vector-amp-edge-1152-is-not-perpendicular-in-pgon-543/m-p/208561#M22045 <DIV class="actalk-migrated-content"><T>One of my work mates keeps getting this error when she goes from ground floor to the 3d Generic Perspective window.<BR /> <BR /> does any one have a clue what it could be?</T></DIV><BR /><IMG src="http://community.graphisoft.com/t5/image/serverpage/image-id/73286i2620D8127C416A35/image-size/large?v=v2&amp;px=999" border="0" alt="vector.JPG" title="vector.JPG" /> Sun, 27 Nov 2011 23:29:09 GMT https://community.graphisoft.com/t5/Installation-update/Normal-vector-amp-edge-1152-is-not-perpendicular-in-pgon-543/m-p/208561#M22045 Anonymous 2011-11-27T23:29:09Z