FCurves are only marked invalid after they have been shown in the UI #75926

New Issue

Sybren A. Stüvel · 2020-04-20T12:18:49+02:00

Sybren A. Stüvel commented

2020-04-20 12:18:49 +02:00

Blender Versions:
Broken in: all recent up to current master (0e7871f9c3). This is a long-standing issue.

Short Description:
Not all erroneous curves are shown when "Show Errors" is selected in the dope sheet.

Explanation:
FCurves can target an RNA path or an array index that is not valid in the current blend file. This includes things like animation data on bones that don't exist. There are legitimate reasons for such data to exist, for example when an Action is used by various compatible but slightly different armatures.

FCurves are marked as invalid when they are drawn in the channel list (FCURVE_DISABLED, set by getname_anim_fcurve() in anim_ipo_utils.c). As a result, when their name is not shown, for example when they are in a collapsed section of the channel list, their "invalid" status is not updated. As a result, using the "Show Errors" option in the Dopesheet will not show all errors.

Here is an example. Both groups "ORG-spine.002" and "ORG-spine.003" contain invalid channels.

Top: When all groups are collapsed in the graph editor, the dopesheet shows no errors at all.
Bottom: When a group is opened, and its channels listed in the graph editor, the dopesheet does show those channels. However, it still does not show the errors from the still-collapsed group.

#75926-example.blend

**Blender Versions:** Broken in: all recent up to current master (0e7871f9c3). This is a long-standing issue. **Short Description:** Not all erroneous curves are shown when "Show Errors" is selected in the dope sheet. **Explanation:** FCurves can target an RNA path or an array index that is not valid in the current blend file. This includes things like animation data on bones that don't exist. There are legitimate reasons for such data to exist, for example when an Action is used by various compatible but slightly different armatures. FCurves are marked as invalid when they are drawn in the channel list (`FCURVE_DISABLED`, set by `getname_anim_fcurve()` in [anim_ipo_utils.c](https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/animation/anim_ipo_utils.c)). As a result, when their name is not shown, for example when they are in a collapsed section of the channel list, their "invalid" status is not updated. As a result, using the "Show Errors" option in the Dopesheet will not show all errors. Here is an example. Both groups "ORG-spine.002" and "ORG-spine.003" contain invalid channels. ![image.png](https://archive.blender.org/developer/F8484958/image.png) ![image.png](https://archive.blender.org/developer/F8484960/image.png) **Top:** When all groups are collapsed in the graph editor, the dopesheet shows no errors at all. **Bottom:** When a group is opened, and its channels listed in the graph editor, the dopesheet does show those channels. However, it still does not show the errors from the still-collapsed group. [#75926-example.blend](https://archive.blender.org/developer/F8484965/T75926-example.blend)

Sybren A. Stüvel commented

2020-04-20 12:18:49 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Sybren A. Stüvel commented

2020-04-20 12:18:49 +02:00

Added subscribers: @dr.sybren, @zanqdo

Philipp Oeser removed the

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FCurves are only marked invalid after they have been shown in the UI #75926