https://community.graphisoft.com/t5/Libraries-objects/AC-Library-v9-to-8-1/m-p/104172#M39814 The only way I know of is it recover from backup. Fri, 28 Jan 2005 21:33:31 GMT TomWaltz 2005-01-28T21:33:31Z https://community.graphisoft.com/t5/Libraries-objects/AC-Library-v9-to-8-1/m-p/104171#M39813 <DIV class="actalk-migrated-content"><T>I have modified some libraries in AC9 and saved over and I forgot that now I can´t use them in AC8.1 again.<BR /> Is there a way to convert back libraries v9 to v8.1?<BR /> Thanks,<BR /> Ricardo</T></DIV> Fri, 28 Jan 2005 20:26:53 GMT https://community.graphisoft.com/t5/Libraries-objects/AC-Library-v9-to-8-1/m-p/104171#M39813 Anonymous 2005-01-28T20:26:53Z https://community.graphisoft.com/t5/Libraries-objects/AC-Library-v9-to-8-1/m-p/104172#M39814 The only way I know of is it recover from backup. Fri, 28 Jan 2005 21:33:31 GMT https://community.graphisoft.com/t5/Libraries-objects/AC-Library-v9-to-8-1/m-p/104172#M39814 TomWaltz 2005-01-28T21:33:31Z