https://forums.autodesk.com/t5/inventor-forum/cannot-change-project-file-in-inventor-2021/m-p/9686282#M135573 <P>Are you sure no files are open?</P> <P>Close Inventor and restart again.</P> <P>&nbsp;</P> <P>&nbsp;</P> Wed, 12 Aug 2020 04:53:22 GMT j.palmeL29YX 2020-08-12T04:53:22Z https://forums.autodesk.com/t5/inventor-forum/cannot-change-project-file-in-inventor-2021/m-p/9686253#M135572 <P>I <span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="project file.png" style="width: 999px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/806236i0C993DF133318A9B/image-size/large?v=v2&amp;px=999" role="button" title="project file.png" alt="project file.png" /></span></P><P>&nbsp;</P><P>&nbsp;</P> Wed, 12 Aug 2020 03:43:43 GMT https://forums.autodesk.com/t5/inventor-forum/cannot-change-project-file-in-inventor-2021/m-p/9686253#M135572 huybtvn 2020-08-12T03:43:43Z https://forums.autodesk.com/t5/inventor-forum/cannot-change-project-file-in-inventor-2021/m-p/9686282#M135573 <P>Are you sure no files are open?</P> <P>Close Inventor and restart again.</P> <P>&nbsp;</P> <P>&nbsp;</P> Wed, 12 Aug 2020 04:53:22 GMT https://forums.autodesk.com/t5/inventor-forum/cannot-change-project-file-in-inventor-2021/m-p/9686282#M135573 j.palmeL29YX 2020-08-12T04:53:22Z https://forums.autodesk.com/t5/inventor-forum/cannot-change-project-file-in-inventor-2021/m-p/9686841#M135574 <P>Try Rebooting fully and then testing ....&nbsp;</P> <P>&nbsp;</P> <P>Making sure nothing is opened or pending ...&nbsp;</P> Wed, 12 Aug 2020 11:10:08 GMT https://forums.autodesk.com/t5/inventor-forum/cannot-change-project-file-in-inventor-2021/m-p/9686841#M135574 mdavis22569 2020-08-12T11:10:08Z https://forums.autodesk.com/t5/inventor-forum/cannot-change-project-file-in-inventor-2021/m-p/9688058#M135575 <P>Hi! This behavior is actually a bug. The bug is that Inventor did not release all files while the document windows were already closed. Are you able to reproduce the behavior?</P> <P>Many thanks!</P> <P>&nbsp;</P> Thu, 13 Aug 2020 21:00:07 GMT https://forums.autodesk.com/t5/inventor-forum/cannot-change-project-file-in-inventor-2021/m-p/9688058#M135575 johnsonshiue 2020-08-13T21:00:07Z https://forums.autodesk.com/t5/inventor-forum/cannot-change-project-file-in-inventor-2021/m-p/9688437#M135576 Hi<BR /><BR />I close the application and restart it working. Thanks<BR /><BR />Best regards,<BR />Huy Thu, 13 Aug 2020 01:14:47 GMT https://forums.autodesk.com/t5/inventor-forum/cannot-change-project-file-in-inventor-2021/m-p/9688437#M135576 huybtvn 2020-08-13T01:14:47Z