Hello Everyone! I found that the Graph Editor’s Add Modifier dropdown and the F-Curve tab aren’t available on some bones, in Pose Mode.
Here’s the file:
No Add-Modifier dropdown & F-Curve tab on some bones
In the example, selecting the foot_ik.R won’t show the Add Modifier dropdown and the F-Curve tab in the Graph Editor:
But selecting the foot_ik.L will:
Why is that so?
In the graph-editor you have to expand the channels (open the lists under RigAction)
foot_ik.R has already cyclic modifier on all transformation channels, ik.L not.
you can select all your channels at once and add the cyclic modifier
I added a Cycles F-Curve modifier to the foot_ik.R in the Graph Editor and got this error:
ERROR (bke.fmodifier): C:\Users\blender\git\blender-v430\blender.git\source\blender\blenkernel\intern\fmodifier.cc:1068 add_fmodifier: Cannot add ‘Cycles’ modifier to F-Curve, as ‘Cycles’ modifier can only be first in stack.
Error: Modifier could not be added (see console for details)
ik.R has already cycles modifier in your file, try it on ik.L
That’s really interesting 
witch blender version is it? i tried your file in 5.0 + 5.1 + 5.2Alpha (22March)
disable Addons? (ie ‘randomise noise offset’)
I use Blender 4.3.2
In 4.3.1 it works here, but i have no graph-editor-addons…
Can you see the Add Modifier dropdown and the F-Curve tab in the Graph Editor, when selecting the foot_ik.R?
Thank you, it means there’s something wrong with Blender 4.3.2
i still think it’s an addon causing the problem. The button ‘random offset noise modifier’ is not available in a ‘normal’ blender version
I disabled the add-on, but the problem persists. I notice that the wrench icons on the animation channels of the foot_ik.L and foot_ik.R look different (please see the screenshots on post #5)
Grey wrench means no modifier on this channel, white means any modifier on this channel, maybe the problem is in your NLA-editor: many locked actions…
Apparently, there’s a bug. If I select one animation channel first, then select all animation channels, the Add Modifier dropdown and F-Curve tab will appear
ok, but this is not a bug, it’s in all blender versions that you have to select a channel first
