https://community.graphisoft.com/t5/Installation-update/can-t-open-an-old-archicad-file/m-p/251510#M26249 What operating system are you running AC 16 on?<BR /> <BR /> When you say 'old file' - what version was the file created with? Fri, 08 Dec 2017 00:04:33 GMT Karl Ottenstein 2017-12-08T00:04:33Z https://community.graphisoft.com/t5/Installation-update/can-t-open-an-old-archicad-file/m-p/251509#M26248 <DIV class="actalk-migrated-content"><T>i can't open an old file with archicad 16 , <BR /> here's the log file , thanks<BR /> <BR /> [meaningless log file deleted by moderator]</T></DIV> Thu, 07 Dec 2017 20:01:51 GMT https://community.graphisoft.com/t5/Installation-update/can-t-open-an-old-archicad-file/m-p/251509#M26248 Anonymous 2017-12-07T20:01:51Z https://community.graphisoft.com/t5/Installation-update/can-t-open-an-old-archicad-file/m-p/251510#M26249 What operating system are you running AC 16 on?<BR /> <BR /> When you say 'old file' - what version was the file created with? Fri, 08 Dec 2017 00:04:33 GMT https://community.graphisoft.com/t5/Installation-update/can-t-open-an-old-archicad-file/m-p/251510#M26249 Karl Ottenstein 2017-12-08T00:04:33Z