Unable to use FMOD 2.02/2.03 in UE 5.5.4

Unreal Engine
1

Hi there,

I’m using UE5.5 with FMOD integration (I’ve tried both 2.02 and 2.03), and I’m encountering an issue where the FMOD plugin fails to load banks during validation inside the Editor — even though everything works fine during gameplay.

I also cannot play FMOD events in the Content Browser. When I place an FMODAmbientSound actor in the level and select an event from the dropdown menu, the Output Log repeatedly shows:LogFMOD: Warning: ... fmod_objectlookup.h(125) - Lookup failed for EventModel: {216426ef-fae8-4ebc-a8a2-ad3e6efee2de}

The specific problem:

  • When I go to Help > Validate FMOD, it pops up an error dialog:

    “Failed to load banks”

  • However, when I press Play:

    • FMOD events play correctly in-game
    • AnimNotify_FMODPlayEvent triggers properly
    • FMOD Studio Live Update connects successfully
    • No errors in runtime logs
    • .bank files are correctly built and located at Content/FMOD/Desktop

What I’ve confirmed:

  • Load All Banks is enabled in Project Settings
  • Bank Output Directory is set to FMOD (not /Content/FMOD)
  • .bank files (Master.bank, Master.strings.bank) are present on disk
  • Events are assigned to banks in FMOD Studio
  • File > Reload Banks runs without errors
  • Project compiles and runs as expected

My question:

Why does Validate FMOD fail with “Failed to load banks” if everything works fine during runtime?

Is this a bug with the Editor-time validation process?
Is there any workaround to allow the Editor to recognize and use .bank files for previewing FMOD events, especially inside tools like the Animation Editor or when triggering events from FMODAmbientSound?

Any help or insight would be greatly appreciated!

2 Likes
2

Can confirm this issue, just created new project with latest FMOD plugin/studio versions and receive this Lookup failed for EventModel every time i try to click or play event from editor.

Downgrading to 2.03.06 helps.

2 Likes
3

Hi,

Thank you both for providing the detailed information and reproduction steps.

I have been able to reproduce the issue on my end and have passed it on to our development team for further investigation.

Unfortunately, there’s no temporary workaround at the moment, so downgrading to 2.02.27 or 2.03.06 is definitely a good option.

I will keep you informed as soon as we have any updates.

4 Likes
4

I can confirm this issue as well, getting the exact same error messages. Have not tried downgrading yet, keeping an eye on this post if it gets an update.

5

Thank you, I have added you to the list.

2 Likes
6

This bug seems present in FMOD 2.02.28, is that also confirmed?

7

Hi,

Yes, we have confirmed that this bug is also present in FMOD 2.02.28.

We have just released our latest version, FMOD 2.02.29 and 2.03.08, which should include a fix for this issue.

Could you please try updating to the latest version and let us know if the problem persists?

8

Hi! I can confirm the issue is fixed in 2.03.08. Thanks! :star_struck:

1 Like