Driver based on NLA strip data throws error #99224

New Issue

Serge Lyatin · 2022-06-27T22:28:49+02:00

Serge Lyatin commented

2022-06-27 22:28:49 +02:00

System Information
Operating system: win 10
Graphics card: 1050ti

Blender Version
Broken: 3.2.0

Short description of error
Driver based on NLA strip's start frame throws "invalid target" error when strip is being moved along timeline. Needs manual update after every moving operation to work correctly.

Exact steps for others to reproduce the error

Add Empty, create any action for it, push it down in NLA editor
With RMB clickCopy as new driver strip's start frame
On default Cube add Geometry Nodes tree and create input float value, Paste driver here with RMB click
Select NLA strip and press G to move it along timeline -> driver error: "Invalid target channel"

Or in provided file select NLA strip and press G to move it along timeline

driver_error.blend

**System Information** Operating system: win 10 Graphics card: 1050ti **Blender Version** Broken: 3.2.0 **Short description of error** Driver based on NLA strip's start frame throws "invalid target" error when strip is being moved along timeline. Needs manual update after every moving operation to work correctly. **Exact steps for others to reproduce the error** - Add Empty, create any action for it, push it down in NLA editor - With RMB click*Copy as new driver* strip's start frame - On default Cube add Geometry Nodes tree and create input float value, *Paste driver* here with RMB click - Select NLA strip and press G to move it along timeline -> driver error: "Invalid target channel" Or in provided file select NLA strip and press G to move it along timeline [driver_error.blend](https://archive.blender.org/developer/F13233223/driver_error.blend)

Serge Lyatin commented

2022-06-27 22:28:49 +02:00

Added subscriber: @SergeL

Germano Cavalcante commented

2022-06-28 19:17:59 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-06-28 19:17:59 +02:00

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

Germano Cavalcante commented

2022-06-28 19:17:59 +02:00

I can confirm.
I'm not sure why this happens, but if you put the id (0) instead of the Strip name in the patch the problem is worked around.

animation_data.nla_tracks["NlaTrack"].strips[0].frame_start

The strip's name seems to change during the transformation.

I can confirm. I'm not sure why this happens, but if you put the id (`0`) instead of the Strip name in the patch the problem is worked around. ``` animation_data.nla_tracks["NlaTrack"].strips[0].frame_start ``` The strip's name seems to change during the transformation.

Brad Clark commented

2022-06-28 23:14:36 +02:00

Added subscriber: @BClark

Brad Clark commented

2022-06-28 23:14:36 +02:00

When you transform it you can see it creates a temp-meta track, no idea why it does this but I would guess that is why the name change shows up?

Brad Clark commented

2022-09-15 17:40:10 +02:00

Still happens in 3.3.

![image.png](https://archive.blender.org/developer/F13496152/image.png) Still happens in 3.3.

Philipp Oeser removed the

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Driver based on NLA strip data throws error #99224