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so here is the situation:

  • I'm doing this all in pose mode

  • created an armature system

  • added a bone called > Properties

  • added a custom properties to this bone (bone properties)

  • copied the data path (Shift + Ctrl + C)

  • selected another bone > this bone has a rotation constraint > influence

  • add driver to that influence channel

  • driver settings

  • averaged value

  • object > armature

  • bone > tried to paste the data path

  • doesn't work > error > failed to find "

this worked before, im using blender 3.3 here

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  • $\begingroup$ easier if you had "Copy as new driver" (instead of copy-data-path), and then paste driver into the influence field. error free. $\endgroup$
    – james_t
    Commented Mar 30, 2023 at 19:10

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After some experimentation, I'd agree that the following is a tad screwy. It has to do with how (in python scripting) you traverse the object and armature hierarchies to get to their custom properties.

If you define a bone-CP when in Edit mode, the cp path must be referenced via the Armature. If you define a bone-CP when in Pose mode, the cp path must be referenced via the object: enter image description here

Why? Just to confuse and frustrate us? Example file with both defined on the "thigh.L" bone and driver on the "upper_arm.L" bone:

It would have been easier if you had "Copy as new driver" (instead of copy-data-path), and then paste driver into the influence field!

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    $\begingroup$ Actually, there is a "copy as new driver" option right? I tried that out and it works out for me. i guess i have to just change the way i copy data info in the future $\endgroup$
    – Wonkey
    Commented Apr 2, 2023 at 12:27
  • $\begingroup$ @Wonkey -- there's always someone's easier suggestion on this site ... after I've pulled my hair out! ;) $\endgroup$
    – james_t
    Commented Apr 2, 2023 at 16:14

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