Page MenuHome

Alembic Sequences Do Not Play Back When Scrubbing The Timeline, Crashes Often
Closed, DuplicatePublic

Description

System Information
Operating system: Windows 10 Build 17763
Graphics card: GTX 1080

Blender Version
Broken: (2.80, 9099305771ec, Beta, 2019-03-18) through (2.80, 700346d377dd, Beta, 2019-03-30)
Worked: (2.79, f4dc9f9d68b, Stable, 2018-03-22)

I have already shed light on this issue here, T62720, but I decided to re-issue a bug report to consolidate my findings over the past 2 or so weeks.

Short description of error

When importing alembic sequences into Blender in 2.79, the mesh sequence plays when scrubbing the timeline like normally. When importing into 2.80, scrubbing on the timeline results in either Blender crashing, no frames of the sequence updating unless switching from edit mode and back to object mode, or Blender crashing at random points.

This is the error that shows up when attempting to scrub on the timeline or when Blender crashes. I have also attached a video displaying the issue.

wm_event_do_handlers: Handling event
wmEvent  type:3 / RIGHTMOUSE, val:1 / PRESS,
shift:0, ctrl:0, alt:0, oskey:0, keymodifier:0,
mouse:(50,51), ascii:' ', utf8:'', keymap_idname:(null), pointer:000001A2DBD67F98
[SCScene :: View Layer]: Operation is entry point for update: GEOMETRY_EVAL()
[SCScene :: View Layer]: Accumulated recalc bits for OBmesh: 2
[SCScene :: View Layer]: BKE_object_eval_uber_data on OBmesh (000001A2DBDD7D58)
[SCScene :: View Layer]: BKE_object_handle_data_update on OBmesh (000001A2DBDD7D58)
Alembic: error reading mesh sample for '/mesh/mesh_shape/.geom' at time 0.000000: IPolyMeshSchema::get()
ERROR: EXCEPTION:
IScalarProperty::get()
ERROR: EXCEPTION:
Ogawa IStreams::read failed.
ERROR (bke.modifier): C:\Users\Aternias\Desktop\blender-git\blender\source\blender\blenkernel\intern\modifier.c:389 modifier_setError: Error reading mesh sample; more detail on the console
Depsgraph updated in 0.005543 seconds.
UI_menutype_draw: opening menu "TOPBAR_MT_editor_menus"
UI_menutype_draw: opening menu "TIME_MT_editor_menus"
UI_menutype_draw: opening menu "VIEW3D_MT_editor_menus"
[SCScene :: View Layer]: Operation is entry point for update: GEOMETRY_EVAL()
[SCScene :: View Layer]: Accumulated recalc bits for OBmesh: 2
[SCScene :: View Layer]: BKE_object_eval_uber_data on OBmesh (000001A2DBDD7D58)
[SCScene :: View Layer]: BKE_object_handle_data_update on OBmesh (000001A2DBDD7D58)

Exact steps for others to reproduce the error

Import the attached alembic files as a sequence, the beginning of water flow will appear (The original file is much longer, but I consolidated it into 16 frames for example sake).


Details

Type
Bug