Alembic export: crash when file is in use by another application #78758
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Reference: blender/blender#78758
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System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.48
Blender Version
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-08 20:30, hash:
31bc76ea4eWorked: 2.83.1
Short description of error
Blender crashes if you are exporting an alembic file and want to save over a abc file that is currently in use (linked) by an other application. In my case this is Clarisse ifx.
Previous Blender Version (2.83.1) printed an error message but didn´t crashed.
Error Message form Blender 2.83.1
Exact steps for others to reproduce the error
Create an alembic file.
Link it into another application so that it is in use.
Try to save over that alembic file by exporting an alembic from blender.
Blender crashes.
Added subscriber: @machieb
Added subscriber: @dr.sybren
Added subscriber: @lichtwerk
Cannot really test here, all I can say is that this is working fine within blender (importing the exported .abc into another instance of blender have it looping there, and exporting/overwriting from the other blender instance will not crash any of them -- it does break the playback though...)
Closed as duplicate of #76412
The Alembic library doesn't handle this properly. Blender could close the file as soon as it has stopped reading from it, but this would require quite some work to still maintain performance.
Changed status from 'Duplicate' to: 'Needs Triage'
I closed this task to quickly, as this is about exporting, not importing.
As I wrote in my description, it was working in Blender 2.83.1. The error message is above. Now there is now errror message, Blender crashes to the desktop.
Alembic export - Blender crashes when file is in use by another applicationto Alembic export: crash when file is in use by another applicationThis issue was referenced by
e8483f9bd7Changed status from 'Needs Triage' to: 'Confirmed'
Changed status from 'Confirmed' to: 'Resolved'