Object of class AcDbDictionary can't be cast to AcDbEntity

[turtle0x1]

I converted a DWG with an empty model space and one paper space layout to JSON using dwgread. I then converted that JSON back to DWG using dwgwrite. When trying to open the DWG AutoCAD 2024 fatal errors ("unhandled access violation").

When doing the dwgwrite I get a fair few errors/warnings (just a sample of the "scariest" looking ones);

ERROR: Required object or entity key missing
ERROR: Unknown MTEXTOBJECTCONTEXTDATA.num_unknown_bits 488 ignored
ERROR: Unexpected STRING at 1386408 of 1509528 tokens, expected OBJECTS OBJECT. json_OBJECTS:3042
ERROR: Expected JSON STRING
ERROR: Unknown num_dashes field
ERROR: Unknown EVALUATION_GRAPH.unknown_bits ....
ERROR: Unknown subclass field EVAL_Node.node
Warning: Object handle not found 3305242624/0xC5020000

Would it be okay to email over the DWG?

Also I see encoding only supports outputting to the the 2000 format, is writing to a later format still on the roadmap?

[rurban]

Would it be okay to email over the DWG?

Yes, please

[rurban]

Also I see encoding only supports outputting to the the 2000 format, is writing to a later format still on the roadmap?

Sure. But for this period we favored the easier preR13 tasks

[turtle0x1]

Would it be okay to email over the DWG?

Yes, please

Still at the gmail address?

[rurban]

any you find

[rurban]

The producer fails with ../oda gh_851_gh851.json:
Object of class AcDbDictionary can't be cast to AcDbEntity.
(20M, pretty large. with 2419 DICTIONARY objects, and 8613 entities). Sorry, impossible to find the error there

[turtle0x1]

What could be causing so many dictionary objects?

[turtle0x1]

The above commit have fixed the fatal error, but AutoCAD now renders some the text as pink & one object is in the wrong position.

It also enters a recovery process, 130 errors, erases 25 objects.

[turtle0x1]

The above Autocad still renders attribute tags / mtext within a block on the paperspace as pink for some reason, any ideas? Maybe something I could look at? (I'll need some pointers)

But down to 74 errors on open, 25 removed again, a 43% decrease 🎉 (I know this a non-goal, but still nice!)

[turtle0x1]

This one causes autocad to crash and never load for me

[rurban]

This one causes autocad to crash and never load for me

That's bad, because we need that long-term. There are still problems with MTEXT attributes, yes. I see them.

[rurban]

Still the same problem

[turtle0x1]

Still crashes when using the JSON generated by the old version using the command ./programs/dwgwrite -I json -o out.dwg in.dwg. Will try regenerating the JSON file.

[rurban]

Missing implemention of MTEXTATTRIBUTEOBJECTCONTEXTDATA, causing these errors.
Which needs the Embedded Object logic for a SCALE object.

However, with this example all MTEXTATTRIBUTEOBJECTCONTEXTDATA.enable_context fields are 0.

you can try with a --enable-debug version

[turtle0x1]

I think your implying I should retest this? If so I can do that by the end of week if thats alright?

[rurban]

I've already tested it. It doesn't crash anymore but mtext attributes are still not supported, leading to this error.