Posted by dellus on
URL: https://forum.librecad.org/HELP-Message-Please-check-its-existence-in-permissions-tp5718789p5718791.html

filename.dxf~ is a temporary back up file. Remove the ~ and try to open it then. It may be your lost file.
Also look out for dxf files with  # added at the beginning, also back up files.