In a 26 MB production drawing with 999 dimensions, the importer drew 300 segments running to the origin, the longest over 21,000 units. The reader took points from groups 13 and 14 for every dimension type, but radius, diameter and angular dimensions store them elsewhere. The writer has the matching fault, so DXF exported from Musa CAD is wrong in AutoCAD too. Classic interop drift that only shows on a real drawing.