Blender Foundation: Blender 2.x BF release: Detail: 25202 Blender crashes when opening smoke simulations made with Blender 2.55.1 r33530

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[#25202] Blender crashes when opening smoke simulations made with Blender 2.55.1 r33530

Date:
2010-12-13 15:36 Priority:
3

State:
Closed

Submitted by:
Dirk Hechler (dhechler) Assigned to:
Janne Karhu (jhk)

Category:
Physics Status:
Fixed / Closed

Relates to:
[#25198] Duplicates:

Patches:

Summary:
Blender crashes when opening smoke simulations made with Blender 2.55.1 r33530

Detailed description

Smoke simulations made with the Blender 2.55.1 r33530 build from graphicall won't work in any other Blender version I tested. This includes:

Blender 2.55 r33297 (win XP 64 bit)
Blender 2.55 r32738 (win XP 64 bit and win 7 32 bit)
Blender 2.54 r32704 (win XP 64 bit)
Blender 2.54 r31878 (win 7 32 bit)
Blendet 2.53 r30581 (win XP 64 bit)

The related bugreport ([#25198]) has a file attached that was made in Blender 2.55.1 r33530 if you want to download an test for yourself.

Normal blend files seems to work, but when you ad a domain and a flow object and save, the blend file can't be opened by other versions. Blender just crashes if you try.

Followup

Message

Date: 2010-12-13 16:44
Sender: Davis Sorenson
Unable to reproduce, Ubuntu 10.10 32 bit r33639.

Date: 2010-12-13 17:12
Sender: Dirk Hechler
I just downloaded Blender 2.55 33621 at graphicall and it can open the blend file. But if I make a new file, save it and try to open it with other blender versions it will crash.

Date: 2010-12-13 17:37
Sender: Ton Roosendaal
Hrm, this is too complex for quick checks.
It is of course possible that the current svn blender has settings saved that crash older blender versions. That's not very nice, but sometimes inevitable.
Janne can answer whether this is the case, and if he can somehow keep upwards compatibility (Important for entire 2.5x series).

Date: 2010-12-16 17:10
Sender: Janne Karhu
This is due to the change in how smoke uses pointcache (r33398). Previously smoke had two separate caches, but now both normal and high resolution smoke are stored in one cache. I just made some changes so that loading shouldn't crash anymore on older versions. To "enable" this fix load the file in a build from r33713 or newer and save the file again. After this the file should be loadable on older versions too.

However.. I advise extreme caution if there are some precious smoke bakes saved in the file, as I can't make any guarantees on what will happen to the caches when loading to an older non-compatible version. So at least backup the cache files somewhere if you want to be certain they're not toast.

Closing the report.

Attached Files:

No Files Currently Attached

Changes:

Field	Old Value	Date	By

status_id	Open	2010-12-16 17:10	jhk
close_date	None	2010-12-16 17:10	jhk
Status	Investigate	2010-12-16 17:10	jhk
assigned_to	none	2010-12-13 17:37	ton
Status	New	2010-12-13 17:37	ton