# (Unity)Logic Control leads to 3D Attributes error? why?
**URL:** https://qa.fmod.com/t/unity-logic-control-leads-to-3d-attributes-error-why/13492
**Category:** Unity
**Created:** [October 16, 2017, 12:00pm UTC](https://qa.fmod.com/t/unity-logic-control-leads-to-3d-attributes-error-why/13492 "2017-10-16T12:00:51Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@licheng314](https://qa.fmod.com/u/licheng314)
#### Post date: [October 16, 2017, 12:00pm UTC](https://qa.fmod.com/t/unity-logic-control-leads-to-3d-attributes-error-why/13492/1 "2017-10-16T12:00:51Z")
I can’t figure out why it happened. I need help!
We need an engine sound in our Unity project. I use logic control to simulate the process of engine. But after I added the logic component in FMOD, the weird error happened: the object with engine sound can’t locate the 3D Attributes correctly any more!
I supposed that the engine sound should always follow the character. But after the first time it has played, it can’t follow the character anymore.
I monitor the distance from the engine sound to listener(the camera) with this code:
Debug.Log(" Distance: " + (Audio.transform.position - Camera.main.transform.position).magnitude.toString())
But it shows that there isn’t any abnormal data with it.
The logic component I added in FMOD is “Loop Region” and “Transition”. Only if I remove them from the engine sound, the error doesn’t happen.
Unity Version : 5.3.4f1
FMOD Version : 1.09.06
So how can I fix this Bug?
Thanks a lot!
---
### Author:  [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [October 19, 2017, 5:13am UTC](https://qa.fmod.com/t/unity-logic-control-leads-to-3d-attributes-error-why/13492/2 "2017-10-19T05:13:21Z")
> [@](#):
>
> I can’t figure out why it happened. I need help!
> We need an engine sound in our Unity project. I use logic control to simulate the process of engine. But after I added the logic component in FMOD, the weird error happened: the object with engine sound can’t locate the 3D Attributes correctly any more!
> I supposed that the engine sound should always follow the character. But after the first time it has played, it can’t follow the character anymore.
> I monitor the distance from the engine sound to listener(the camera) with this code:
> Debug.Log(" Distance: " + (Audio.transform.position - Camera.main.transform.position).magnitude.toString())
>
> But it shows that there isn’t any abnormal data with it.
> The logic component I added in FMOD is “Loop Region” and “Transition”. Only if I remove them from the engine sound, the error doesn’t happen.
> Unity Version : 5.3.4f1
> FMOD Version : 1.09.06
> So how can I fix this Bug?
> Thanks a lot!
Are you getting any warnings or errors in the console log?