https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-13-to-11/m-p/132997#M14236 You can do a save as and for file type choose Archicad 11. <BR /> But, you will have to reset all your library parts back to AC 11 as it will not be able to read newer library parts. Wed, 28 Apr 2010 17:11:57 GMT Erika Epstein 2010-04-28T17:11:57Z https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-13-to-11/m-p/132996#M14235 <DIV class="actalk-migrated-content"><T>Hello !<BR /> <BR /> Can someone tell me, how can I save ArchiCAD 13 to 11...<BR /> <BR /> Thank you !<BR /> <BR /> Matjaž</T></DIV> Wed, 28 Apr 2010 15:57:30 GMT https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-13-to-11/m-p/132996#M14235 Anonymous 2010-04-28T15:57:30Z https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-13-to-11/m-p/132997#M14236 You can do a save as and for file type choose Archicad 11. <BR /> But, you will have to reset all your library parts back to AC 11 as it will not be able to read newer library parts. Wed, 28 Apr 2010 17:11:57 GMT https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-13-to-11/m-p/132997#M14236 Erika Epstein 2010-04-28T17:11:57Z https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-13-to-11/m-p/132998#M14237 All I can choose in SAVE AS is ArchiCAD 12, not 11... and it doesnt opens it... is there like a add-on file (like for save as to Artlantis 3? )?<BR /> <BR /> Any idea ? Wed, 28 Apr 2010 17:16:19 GMT https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-13-to-11/m-p/132998#M14237 Anonymous 2010-04-28T17:16:19Z https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-13-to-11/m-p/132999#M14238 Matjaž:<BR /> <BR /> Each version of ArchiCAD only saves back one version, so to go from ArchiCAD 13 to 11, you need to Save As... in 13 to 12, then open that file in ArchiCAD 12 and Save As... to 11. If you don't have 12, then talk to your local reseller (the dongles work with previous versions). Erika's advice on library parts stands: ArchiCAD 11 will not be able to read 13 library parts, and there is no easy way to change a library part to an earlier version.<BR /> <BR /> You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.<BR /> <BR /> David Thu, 29 Apr 2010 12:03:10 GMT https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-13-to-11/m-p/132999#M14238 David Maudlin 2010-04-29T12:03:10Z