# Lookup failed for InputBusModel
**URL:** https://qa.fmod.com/t/lookup-failed-for-inputbusmodel/17244
**Category:** FMOD Studio
**Created:** [May 25, 2021, 2:13pm UTC](https://qa.fmod.com/t/lookup-failed-for-inputbusmodel/17244 "2021-05-25T14:13:38Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@maximilianmueller](https://qa.fmod.com/u/maximilianmueller)
#### Post date: [May 25, 2021, 2:13pm UTC](https://qa.fmod.com/t/lookup-failed-for-inputbusmodel/17244/1 "2021-05-25T14:13:38Z")
Hello, after receiving some warnings such as ‘AsyncCommandBuffer::growBuffer’ and ‘SoundSourceInstrumentInstance::startChannelIfReady : Loading delay exceeded, sound may play at incorrect time’, I ran the profiler and got the following warnings/errors for several events, all of which had GUIDs associated with snapshots. Any idea on what might be going on? I wasn’t able to find any documentation on what the InputBusModel is. Thank you!
> 09:38:18 fmod\_objectlookup.h(120), ObjectLookup::get(): Lookup failed for InputBusModel: {00000000-0000-0000-0000-000000000000}
> 09:38:18 fmod\_runtime\_manager.cpp(1958), PostLoad::fixUpOutputFormatForEventSounds(): Event instrument ‘{2d2c544b-ea9b-42ed-8848-a2db9ce9fa83}’ has missing input bus ‘{00000000-0000-0000-0000-000000000000}’
> 09:38:26 fmod\_os\_misc.cpp(135), FMOD\_OS\_File\_Open(): fopen failed to open ‘’, errno = 2
> 09:38:26 fmod\_playback\_instrument.cpp(1121), SoundSourceInstrumentInstance::startChannelIfReady(): Waveform instance in error state 18
---
### Author:  [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [June 1, 2021, 12:34am UTC](https://qa.fmod.com/t/lookup-failed-for-inputbusmodel/17244/2 "2021-06-01T00:34:22Z")
Make sure you are constantly calling update, otherwise the command buffer can fill up and need to resize, otherwise the buffer size can be set via [FMOD\_STUDIO\_ADVANCEDSETTINGS::commandqueuesize](https://fmod.com/resources/documentation-api?version=2.1&page=studio-api-system.html#fmod_studio_advancedsettings).
---
### Author:  [@maximilianmueller](https://qa.fmod.com/u/maximilianmueller)
#### Post date: [June 1, 2021, 3:09am UTC](https://qa.fmod.com/t/lookup-failed-for-inputbusmodel/17244/3 "2021-06-01T03:09:57Z")
Hi Cameron, thank you so much for your reply. Could you elaborate on what exactly needs to be called in update? I had assumed that RuntimeManager handled this sort of low-level activity - are you referring to the calling of events / setting of parameters in update?
Best,
Maximilian
---
### Author:  [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [June 4, 2021, 3:45am UTC](https://qa.fmod.com/t/lookup-failed-for-inputbusmodel/17244/4 "2021-06-04T03:45:39Z")
Are you referring to the RuntimeManager in the Unity Integration?
Are you able to share your entire output log?
What version of FMOD are you using?