Posted by LordOfBikes on May 26, 2022; 9:13am
URL: https://forum.librecad.org/Import-error-error-reading-DXF-DWG-sections-tp5721715p5721721.html

The AC1021 stands for AutoCAD 2007, this is a version supported by our libdxfrw library. My hope was that it is a newer version and providing an older one, like 2007, could solve the issue.
But as it is already 2007 this hope is gone.

One option coming to my mind is to try the latest QCAD version. They have still a free version.
When QCAD opens the files flawlessly, but misses tools you have to pay for, you possibly can export smaller portions to use with LibreCAD then.

Otherwise I'm afraid to say, that LibreCAD can't help you with that file.

Armin