https://community.graphisoft.com/t5/Modeling/Disappearing-PDF-in-Trace-Reference/m-p/145688#M78191 It's a known bug. I reported it a while ago. I don't know when to expect a fix. For now you have to place the PDF in the active window rather than referencing it. Tue, 13 Jan 2009 00:44:33 GMT Anonymous 2009-01-13T00:44:33Z https://community.graphisoft.com/t5/Modeling/Disappearing-PDF-in-Trace-Reference/m-p/145685#M78188 <DIV class="actalk-migrated-content"><T>So I have a PDF that placed as an external drawing and I am using it as a template for a drawing. I am trace referencing it in from my "working level" and for some reason when I zoom in even remotely close the trace reference disappears. I have no problem zooming when I am in the level that the PDF resides. Could this be a graphics card problem? Thanks!</T></DIV> Mon, 29 Dec 2008 17:33:35 GMT https://community.graphisoft.com/t5/Modeling/Disappearing-PDF-in-Trace-Reference/m-p/145685#M78188 Chris Grantham 2008-12-29T17:33:35Z https://community.graphisoft.com/t5/Modeling/Disappearing-PDF-in-Trace-Reference/m-p/145686#M78189 Chris:<BR /> <BR /> Same problem, with some workarounds, reported here:<BR /> <BR /> <A href="http://archicad-talk.graphisoft.com/viewtopic.php?p=125436&amp;highlight=pdf#125436" target="_blank">PDF as Trace Reference</A><BR /> <BR /> David Tue, 30 Dec 2008 14:07:17 GMT https://community.graphisoft.com/t5/Modeling/Disappearing-PDF-in-Trace-Reference/m-p/145686#M78189 David Maudlin 2008-12-30T14:07:17Z https://community.graphisoft.com/t5/Modeling/Disappearing-PDF-in-Trace-Reference/m-p/145687#M78190 not working for me either. <IMG src="https://community.graphisoft.com/legacyfs/online/emojis/icon_cry.gif" style="display : inline;" /> Mon, 12 Jan 2009 22:57:01 GMT https://community.graphisoft.com/t5/Modeling/Disappearing-PDF-in-Trace-Reference/m-p/145687#M78190 Steve Jepson 2009-01-12T22:57:01Z https://community.graphisoft.com/t5/Modeling/Disappearing-PDF-in-Trace-Reference/m-p/145688#M78191 It's a known bug. I reported it a while ago. I don't know when to expect a fix. For now you have to place the PDF in the active window rather than referencing it. Tue, 13 Jan 2009 00:44:33 GMT https://community.graphisoft.com/t5/Modeling/Disappearing-PDF-in-Trace-Reference/m-p/145688#M78191 Anonymous 2009-01-13T00:44:33Z https://community.graphisoft.com/t5/Modeling/Disappearing-PDF-in-Trace-Reference/m-p/145689#M78192 This is still happening in 22 with DWG's if placed as a drawing. Must be a memory problem as it is only affecting our older PC's Wed, 25 Sep 2019 14:19:49 GMT https://community.graphisoft.com/t5/Modeling/Disappearing-PDF-in-Trace-Reference/m-p/145689#M78192 Anonymous 2019-09-25T14:19:49Z