When pressing v while a node is selected or when pressing control+rmb > scope channels the channel editor does not open. Do I have to modify a setting in the preferences :?:

I believe it is Shift + MMB

Hey sascha, I think that functionality will only scope the parameters if they already have animation on them.

Shift + MMB is the same as MMB.

The object's channels have animation, one channel has a key and the other one has an expression. If I open the Channel Editor manually and when I click on Scope> and select my selected object both channels appear under Other Parameters.

Isnt Shift + LMB ?

scoping is shift + MMB
scope append is shift + LMB

Thanks, v does work now from the network editor. From time to time I have the feeling Houdini is pulling my leg.