BX 7C "value" every time "new" as NEXT BOTTON?

Correct, midi Foot-switch send cc124, value 1 for ON and for OFF 0(momentary switch - stompbox mode - on behringer1010 uno chip).

Would like that 1st push would send value 10 and 0, second push 20 value 0 etc...I want add values(depends on presets)...But do not know how to start with code....

Also stuck with idea: when click "program change 03", then if is pressed CC124 become cc125. ( stompbox-mode is always fixed) cannot have different CC messige with changing program or bank. I think this should be solved with streambyter, but don't know to start with code. I just know to change value 1 to 127 on cc124;)

Thanks UncleDave, Yes code need 0 zero from releasing the switch. Yes first 10 then 20... to 120 and back yes to 10. Ideal.

YES I stock here, just "Program change 3" or PC3 would change cc124 to cc125. If I would click PC2 or PC5 or whatever would not change. I will then each PCX turn to different number from example code, if will need more from stomp-box mode. thanks uncleDave!

YES, "JUST IF" IS PC3 pressed - every value of cc124 converted to cc125 ! Yes, This just happened if PC3 is pressed. As soon I click PC5 or PC1 etc... CC124 stays unattached EXCEPT If I copy your code from PC3 and insert it on new PC and CC. That means that all PROGRAM CHANGE can have own (cc)stopmboxes, now are fixed on all program changes.

So, here's the basic script. PC3 switches to CC125, any other PC switches back to CC124. The count just keeps advancing. To use this copy/paste into StreamByter and Install Rules. If you want to use it in an AUv3, save it to iCloud.
#ModifyCC
# NOTE: Be sure to use $ on decimal numbers, like $124.
# Otherwise they are hex and will not work.

If load
Alias $12 maxCount
# J00 stores the current count, runs from 1 to 12, then repeats
# J08 stores the CC# to be sent when CC124 is received
Ass J00 = 1 0 0 0   0 0 0 0
Ass J08 = $124 0 0 0  0 0 0 0
End

# message is in M0, M1, M2 for CC command, CC#, and value
If MT == B0    # CC message
 If M1 == $124    # CC 124
   Ass M1 = J08    # change CC#, both press and release
   If M2 > 0    # on CC124 press, send the new count
     Mat M2 = $10 * J00    # change value to 10 times count
     Mat J00 = J00 + 1    # update count for next time
     If J00 > maxCount
       Ass J00 = 1
     End
   End
 End
End

# all PCs are sent on
If MT == C0    # PC message
 Ass J08 = $124    # reset CC# to default
 If M1 == 3    # change to 125 for PC3
   Ass J08 = $125
 End
End
I can change it to use a different counter for each PC. It would help if we specified how many different PCs we need to support.

How are you using SB? In MidiFire, or in a host like AUM or AudioBus?

You can test this by routing your controller to it and watching the SB monitor (magnifying glass). It shows the received messages and the sent messages side-by-side.

thanks for sharing code! Need to test!

Excellent. Let me know if you need any change that you can't figure out. SB is pretty powerful for doing this stuff, although it may seem a little strange at times.

Edit: I saw your earlier response. I'll add resetting the number later today. For now it just continues on when you change PC. Should it remember the last value for each PC, or go back to 10 whenever PC is sent, or whenever PC changes?

Also, right now the count is reset when you load a MidiFire Scene, so the first CC124 always sends 10. We can change that so it picks up where it left off. Which do you prefer? Also, it always starts with CC124; it could resume with the CC it was last using.

How many different PCs are we expecting? We can then reserve space to store them, so no troubles in the future.

Are you happy with the PC messages being sent from the script? We could easily block them. And, of course, anything else that enters the script will exit without any change.