# Can't set probability for transition regions?
**URL:** https://qa.fmod.com/t/cant-set-probability-for-transition-regions/13033
**Category:** FMOD Studio
**Created:** [March 13, 2017, 11:47am UTC](https://qa.fmod.com/t/cant-set-probability-for-transition-regions/13033 "2017-03-13T11:47:02Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@KarlFlodin](https://qa.fmod.com/u/KarlFlodin)
#### Post date: [March 13, 2017, 11:47am UTC](https://qa.fmod.com/t/cant-set-probability-for-transition-regions/13033/1 "2017-03-13T11:47:02Z")
So I have a music event where I want to randomize transitions to different markers.
The way I understood to do this is that I stack several transition regions and then from bottom up I set their probability to be lower the higher up.
So if I have three transition regions their probabilities should be from bottom up: 100%, 50%, 33%.
The problem I’m having here is that I can’t change the probability of the regions.
When I try to turn the knob only the green line around the knob changes, but as soon as I navigate away from the event it resets to 100%.
Is this a bug or am I missing something here?
EDIT: I am pressing the dice button, but still no difference.
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### Author:  [@joseph](https://qa.fmod.com/u/joseph)
#### Post date: [March 14, 2017, 3:27am UTC](https://qa.fmod.com/t/cant-set-probability-for-transition-regions/13033/2 "2017-03-14T03:27:56Z")
> [@](#):
>
> So I have a music event where I want to randomize transitions to different markers.
> The way I understood to do this is that I stack several transition regions and then from bottom up I set their probability to be lower the higher up.
> So if I have three transition regions their probabilities should be from bottom up: 100%, 50%, 33%.
> The problem I’m having here is that I can’t change the probability of the regions.
> When I try to turn the knob only the green line around the knob changes, but as soon as I navigate away from the event it resets to 100%.
> Is this a bug or am I missing something here?
>
> EDIT: I am pressing the dice button, but still no difference.
What colour is the dice button while you’re adjusting the knob?
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### Author:  [@henriettelj](https://qa.fmod.com/u/henriettelj)
#### Post date: [February 16, 2018, 10:19am UTC](https://qa.fmod.com/t/cant-set-probability-for-transition-regions/13033/3 "2018-02-16T10:19:17Z")
Got the same problem. The Dice is yellow, but the probability knob refuses to move.
version 1.10.03 on Build #93157 on Mac version 10.10.5
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### Author:  [@henriettelj](https://qa.fmod.com/u/henriettelj)
#### Post date: [February 16, 2018, 10:23am UTC](https://qa.fmod.com/t/cant-set-probability-for-transition-regions/13033/4 "2018-02-16T10:23:23Z")
My probability knob starts working if I turn the Quantization interval on. Does the probability knob need to have a quantization grid in order to work?
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### Author:  [@joseph](https://qa.fmod.com/u/joseph)
#### Post date: [February 20, 2018, 1:53am UTC](https://qa.fmod.com/t/cant-set-probability-for-transition-regions/13033/5 "2018-02-20T01:53:25Z")
> [@](#):
>
> My probability knob starts working if I turn the Quantization interval on. Does the probability knob need to have a quantization grid in order to work?
It shouldn’t need one! This is a bug. I’ve added it to our bug tracker, and it will be fixed in an upcoming version of FMOD Studio.
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### Author:  [@joseph](https://qa.fmod.com/u/joseph)
#### Post date: [February 20, 2018, 11:19pm UTC](https://qa.fmod.com/t/cant-set-probability-for-transition-regions/13033/6 "2018-02-20T23:19:33Z")
This is a bug that affects transition regions that lack quantization. Transition markers and transition regions with quantization are unaffected.
This issue has been added to our bug tracker, and will be fixed in an upcoming release of FMOD Studio.