0.13.3.7426 - DWG to DXF -> AutoCAD 2025 crash

[Mannshoch]

After converting a DWG (R2018)

• assembly, 7 level tree
• total 105 dwg as xref available
• 290MB in size)
• some dwg are missing

I got a 49MB DXF

Open In AutoCAD Mechanical Desktop --> Crash
Open In FreeCAD:

Unable to parse value '', using zero as its value
CDxfRead::get_next_record() Failed to get integer record type from ''

(I deduplicated this log (compare first 16 chars) because the original was 2151 rows in total.)

& 'C:/tmp/libredwg-0.13.3.7426-win64/dwg2dxf.exe' 'C:/tmp/test.dwg'  '-o' 'C:/tmp/test.dxf' 2> log.log

dwg2dxf.exe : Warning: checksum: 0xfca9b946 (calculated) CRC mismatch 0xa03d74-0xa04d50
At line:1 char:1
+ & 'C:/tmp/libredwg-0.13.3.7426-win64/dwg2dxf.exe' 'C:/Use ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (Warning: checks...a03d74-0xa04d50:String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 

Warning: Unstable Class object 501 MATERIAL (0x481) 14/0
Warning: TODO TABLESTYLE r2010+ missing fields
Warning: Unknown flag (0x2)
Warning: Object handle not found 4841/0x12E9 in 1713 objects of max 0x30FA7 handles
Warning: Wrong POLYLINE.layer 12E9
ERROR: Invalid ATTRIB.keep_duplicate_records 66
Warning: num_inserts [RC 1]: 152 != 1
ERROR: Invalid BLOCK_HEADER.preview_size 538976288
ERROR: bit_read_TF buffer overflow at 17.1 + 160 > 100
Warning: Unreasonable high num_owned value
Warning: Unhandled Class object 24590 ACDBASSOCPERSSUBENTMANAGER (0x8032) 110608/0
ERROR: Invalid CMC flag 0x9f ignored
ERROR: Invalid zero_18 size 3. Need min. 48 bits, have 0 for .
Warning: AcDs schdat segment yet unhandled
Warning: AcDs freesp segment yet unhandled
Warning: AcDs _data_ segment yet unhandled
Warning: AcDs prvsav segment yet unhandled
ERROR: Invalid ididx size 197590. Need min. 12645760 bits for RLL, have 272768 at @85840.0  for .

WRITE ERROR C:/tmp/test.dxf
WRITE ERROR C:/tmp/test.dxf

Important:
I'm not allowed to provide the dwg/dxf Files. If you need additional Data, pleas give me advice, I will collent them for you.

[michal-josef-spacek]

There are many issues in dwg2dxf. From trivial issues like #1052 to more complex.