MIDI Device Manager: Please Steinberg, anyone, HELP!

I want to create a MIDI device panel with 3 Knobs.
Whenever the value of one of these kobs changes, a sysex message should be send.
The sysex message has to contain all three values of the three knobs.

For example: My MIDI device shall receive the sysex message “F0 aa bb cc F7”.

So I set up three parameters, pAA, pBB and pCC, and have each of these parameters transmit this sysex message

  • Parameter Name: pAA
    value formula
    aa x
    bb pBB (allways gives error)
    cc pCC (allways gives error)

Parameter Name: pBB
value formula
aa pAA (allways gives error)
bb x
cc pCC (allways gives error)

Parameter Name: pCC
value formula
aa pAA (allways gives error)
bb pBB (allways gives error)
cc x

Why am I always getting an error here?

Isn’t it possible to have a sysex string sent whith its values derive from multiple panel objects???

Please, I need your help!

I’m pretty sure that only one variable per sys-ex message is implemented, sorry.