https://community.graphisoft.com/t5/Modeling/copying-from-Archicad-18-into-Archicad-16/m-p/230875#M123821 Try Copy/Paste first if that does not work save 18 to DWG and open the DWG in 16. Wed, 04 Nov 2015 11:41:08 GMT Eduardo Rolon 2015-11-04T11:41:08Z https://community.graphisoft.com/t5/Modeling/copying-from-Archicad-18-into-Archicad-16/m-p/230874#M123820 <DIV class="actalk-migrated-content"><T>Hello.<BR /> I have the following problem: I want to copy a line drawing from an Archicad 18 file into an Archicad 16 file. How can I do this?<BR /> Thank you.</T></DIV> Wed, 04 Nov 2015 11:14:21 GMT https://community.graphisoft.com/t5/Modeling/copying-from-Archicad-18-into-Archicad-16/m-p/230874#M123820 Anonymous 2015-11-04T11:14:21Z https://community.graphisoft.com/t5/Modeling/copying-from-Archicad-18-into-Archicad-16/m-p/230875#M123821 Try Copy/Paste first if that does not work save 18 to DWG and open the DWG in 16. Wed, 04 Nov 2015 11:41:08 GMT https://community.graphisoft.com/t5/Modeling/copying-from-Archicad-18-into-Archicad-16/m-p/230875#M123821 Eduardo Rolon 2015-11-04T11:41:08Z https://community.graphisoft.com/t5/Modeling/copying-from-Archicad-18-into-Archicad-16/m-p/230876#M123822 Thank you for the answer.<BR /> Copy/Paste does not work. Saving to DWG does. Wed, 04 Nov 2015 11:46:50 GMT https://community.graphisoft.com/t5/Modeling/copying-from-Archicad-18-into-Archicad-16/m-p/230876#M123822 Anonymous 2015-11-04T11:46:50Z https://community.graphisoft.com/t5/Modeling/copying-from-Archicad-18-into-Archicad-16/m-p/230877#M123823 Or, your other option, for future reference, is to save in AC18 as AC17, then open it in AC17 and Save As AC16.<BR /> Most probably lines and similar 2D element will be saved back into the prior version without data loss. Wed, 04 Nov 2015 19:10:33 GMT https://community.graphisoft.com/t5/Modeling/copying-from-Archicad-18-into-Archicad-16/m-p/230877#M123823 Laszlo Nagy 2015-11-04T19:10:33Z