# \[FMOD\] System::update() returned ERR\_INTERNAL for STUDIO\_SYSTEM (0x1FFF3F)

**URL:** <https://qa.fmod.com/t/fmod-system-update-returned-err-internal-for-studio-system-0x1fff3f/20249>\
**Category:** FMOD Studio\
**Tags:** unity\
**Created:** [May 23, 2023, 9:36am UTC](https://qa.fmod.com/t/fmod-system-update-returned-err-internal-for-studio-system-0x1fff3f/20249 "2023-05-23T09:36:50Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![simingtu](https://avatars.discourse-cdn.com/v4/letter/s/9e8a1a/32.png) [@simingtu](https://qa.fmod.com/u/simingtu)\
**Post date:** [May 23, 2023, 9:36am UTC](https://qa.fmod.com/t/fmod-system-update-returned-err-internal-for-studio-system-0x1fff3f/20249/1 "2023-05-23T09:36:50Z")

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![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/9/9771c1ebb24c0caeeeef68b5f54ccfb5aede7704.png)

i play two event at the same frame, an error appeared.  
can you give me some suggestions.

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**Author:** ![Connor\_FMOD](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/connor_fmod/32/3685_2.png) [@Connor\_FMOD](https://qa.fmod.com/u/Connor_FMOD)\
**Post date:** [May 24, 2023, 6:34am UTC](https://qa.fmod.com/t/fmod-system-update-returned-err-internal-for-studio-system-0x1fff3f/20249/2 "2023-05-24T06:34:41Z")

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Hi,

What version of FMOD are you using?  
How are you playing the two events? E.g. Event emitters or via code?

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<div class="post-metadata">

**Author:** ![simingtu](https://avatars.discourse-cdn.com/v4/letter/s/9e8a1a/32.png) [@simingtu](https://qa.fmod.com/u/simingtu)\
**Post date:** [May 24, 2023, 8:17am UTC](https://qa.fmod.com/t/fmod-system-update-returned-err-internal-for-studio-system-0x1fff3f/20249/3 "2023-05-24T08:17:48Z")

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my fmod version is 2.01.11  
via code. code like this:  
FMOD.RESULT result = instance.start();

can you tell me what 's the reason?  
i have no source code, can u tell me some possible reason can lead to this error log.

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<div class="post-metadata">

**Author:** ![Connor\_FMOD](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/connor_fmod/32/3685_2.png) [@Connor\_FMOD](https://qa.fmod.com/u/Connor_FMOD)\
**Post date:** [May 29, 2023, 12:12am UTC](https://qa.fmod.com/t/fmod-system-update-returned-err-internal-for-studio-system-0x1fff3f/20249/4 "2023-05-29T00:12:00Z")

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Hi,

I also notice that there is the assertion `state->mInstanceCount` which is caused by an instrument being stopped after it has been cleaned up. Before these two events are being played are there any other events that are being stopped that maybe have already been released? Would it be possible to get the full code where these issues are being triggered?

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<div class="post-metadata">

**Author:** ![simingtu](https://avatars.discourse-cdn.com/v4/letter/s/9e8a1a/32.png) [@simingtu](https://qa.fmod.com/u/simingtu)\
**Post date:** [June 1, 2023, 9:41am UTC](https://qa.fmod.com/t/fmod-system-update-returned-err-internal-for-studio-system-0x1fff3f/20249/5 "2023-06-01T09:41:44Z")

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this bug, i have found the reason. we reference event B when create event A.  
create event by this way will lead to log error. finally, i directly drag audio to event A, the error log disappeared.  
i do not know why, may be use event A reference event B, when stop event A, event B has already released, that will lead to this error.

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<div class="post-metadata">

**Author:** ![Connor\_FMOD](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/connor_fmod/32/3685_2.png) [@Connor\_FMOD](https://qa.fmod.com/u/Connor_FMOD)\
**Post date:** [June 1, 2023, 11:10pm UTC](https://qa.fmod.com/t/fmod-system-update-returned-err-internal-for-studio-system-0x1fff3f/20249/6 "2023-06-01T23:10:23Z")

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Hi,

Thank you for sharing the solution. Would it be possible to see a the code that was causing the error?