Latest Blender3.0 cannot open this .blend file

Archive Blender Development
1

1.blend.xml (1.5 MB)
No response for a quite long time. Only 1487kb. There are many objects reuse same mesh.

delete .xml in file name

128.blend.xml (350.0 KB)
256.blend.xml (552.8 KB)
Here are two new samples, one is at most 128 reuse times, one is at most 256 reuse times.

2

This does not appear to be a blend file. Here’s the first bunch of bytes in your file:

paulm@cmstorm 09:30:~$ hexdump -C 1.blend | head -n 10
00000000  28 b5 2f fd a0 f4 04 01  00 55 2a 00 a6 6e b6 4c  |(./......U*..n.L|
00000010  d0 b0 6e 03 e8 51 2f a0  74 34 e4 40 2c ae 33 44  |..n..Q/.t4.@,.3D|
00000020  ee 41 3a 20 9b 23 46 41  2a 84 43 9c 94 9c c0 89  |.A: .#FA*.C.....|
00000030  d9 f6 ce 14 13 a6 88 5f  8d c5 87 98 a6 84 42 28  |......._......B(|
00000040  3c 2c 7e 6f 7c e1 4f 08  48 bb 6a b9 11 82 c7 35  |<,~o|.O.H.j....5|
00000050  d2 48 70 72 3c 52 52 d2  cb 88 48 0a 9f 00 a7 00  |.Hpr<RR...H.....|
00000060  9e 00 0b 76 2a 2a 2d de  0a 59 43 92 21 26 93 c9  |...v**-..YC.!&..|
00000070  63 b5 6a 71 e0 70 38 95  aa aa 3e f3 7c 74 4b 4a  |c.jq.p8...>.|tKJ|
00000080  54 3e 2c 32 16 19 18 b6  9d 1f 1f 1f 27 8a a2 3c  |T>,2........'..<|
00000090  b2 0c 23 4a d3 74 a6 6d  db 1a 37 f8 f6 73 1d 47  |..#J.t.m..7..s.G|

Here’s what a blend file looks like:

paulm@cmstorm 09:30:~$ hexdump -C animlight.blend | head -n 10
00000000  42 4c 45 4e 44 45 52 2d  76 32 38 30 52 45 4e 44  |BLENDER-v280REND|
00000010  48 00 00 00 60 48 ce 5f  fe 7f 00 00 00 00 00 00  |H...`H._........|
00000020  01 00 00 00 01 00 00 00  fa 00 00 00 53 63 65 6e  |............Scen|
00000030  65 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |e...............|
00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000060  00 00 00 00 00 00 00 00  00 00 00 00 54 45 53 54  |............TEST|
00000070  08 00 01 00 08 66 c9 48  1a 7f 00 00 00 00 00 00  |.....f.H........|
00000080  01 00 00 00 80 00 00 00  80 00 00 00 17 17 17 df  |................|
00000090  17 17 17 df 18 18 18 df  19 19 19 df 15 15 15 df  |................|

Trying to detect the file type of your file:

paulm@cmstorm 09:30:~$ file 1.blend 
1.blend: Zstandard compressed data (v0.8+), Dictionary ID: None
paulm@cmstorm 09:32:~$ zstdcat 1.blend | hexdump -C | head -n 10
00000000  42 4c 45 4e 44 45 52 2d  76 33 30 30 52 45 4e 44  |BLENDER-v300REND|
00000010  48 00 00 00 50 ae ff 66  03 00 00 00 00 00 00 00  |H...P..f........|
00000020  01 00 00 00 01 00 00 00  fa 00 00 00 53 63 65 6e  |............Scen|
00000030  65 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |e...............|
00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000060  00 00 00 00 00 00 00 00  00 00 00 00 54 45 53 54  |............TEST|
00000070  08 00 01 00 88 8e 54 d4  04 01 00 00 00 00 00 00  |......T.........|
00000080  01 00 00 00 80 00 00 00  80 00 00 00 00 00 00 00  |................|
00000090  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

So somehow you ended up with a zstd-compressed file?

Edit: I guess I learned something today, that blender files can be in a compressed form :slight_smile:

3

I don’t know. This is part of my code.

1027
1027956×262 19.8 KB

then I use blender.exe --background --python cmd run my script.
That script ends with these two lines:
bpy.ops.wm.save_as_mainfile(filepath=f’{args.save_path}.blend’, compress=True)

bpy.ops.render.render(write_still=True)

I can get a render result like this:

image.0
image.01280×960 363 KB

But the saved blender file is like that, if I do not use compress=True, this blend file will be 259MB and still cannot be opened.

Also the scene takes over 30 seconds to build, seems “collection.objects.link(obj)” take many time, no idea how to avoid this time-consuming situation. The other script I wrote to build a .vrscene for vray only take less than 1 second to build this test scene.

4

If you create a smaller test scene, then does it work?

5

yes, reuse around 64 times can work smoothly, only 0.4 second to build and open immediately. 128 times build 0.9 seconds and open will take a while. 256 times build 3.17 seconds and cannot open.

6

With “cannot open” you mean Blender gets stuck loading the file, right? It’s not that you get an error?

7

Yes，no responding，not get an error.

8

Please report bugs to the tracker:
https://developer.blender.org/maniphest/task/edit/form/1/

9

:anchor: T92596 No responding open .blend file reuse mesh many times (blender.org)

Thanks, I just reported this bug.

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13

Hey, since this is a bug report, and not a development topic, I’m moving this to be unlisted.