Posted by dellus on Oct 11, 2022; 9:47pm
URL: https://forum.librecad.org/Import-Error-Error-reading-DXF-DWG-sections-tp5721831p5722100.html

Why do you "import" the file? This means to import a drawing into an existing one. Thus the question for "Image", if you want to place a bitmap image like a photo or scan in a drawing. Just open the dxf file.
The latest dxf file version LibreCAD can open is dxf 2007.
Yes, 500MB is really heavy, this might be the reason. Does it contain 3d elements? How large is the original dwg? Can you provide it here?
You may also try to use the current LibreCAD V2.2.0 rc4 development version. Much improved and as stable as 2.1.3.