Posted by dellus on
URL: https://forum.librecad.org/Crash-on-opening-DXF-file-tp5719750p5719752.html

The file and dxf version from Altium may not be supported completely by LibreCAD, it supports up to dxf 2007. You may ask to get an according file.
You also may try to use development version 2.2.0 rc, the issue with those lines spreading from the origin has been fixed there.
Or you can just delete them manually.
If there are no secrets about it you could provide a sample file here for inspection.