# Failed to build bank "master" due to the following error: File not found problem **URL:** \ **Category:** FMOD Studio\ **Created:** [April 12, 2021, 11:09am UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029 "2021-04-12T11:09:11Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![filvox](https://avatars.discourse-cdn.com/v4/letter/f/7993a0/32.png) [@filvox](https://qa.fmod.com/u/filvox)\ **Post date:** [April 12, 2021, 11:09am UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/1 "2021-04-12T11:09:11Z")
Unreal version: 4.26.1 FMOD version: 2.01.08 (switched from 2.01.07, but the issue occur on 2.01.07 at all!) So after switching to 2.01.08 whenever I try to build the banks I get the following error: [error|439x130](https://qa.fmod.com/uploads/short-url/cWk1g51z27g0vC3iLLN06IfRRW3.png) Can’t find a fix, what can be causing this? ---
**Author:** ![Alcibiade](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/alcibiade/32/4284_2.png) [@Alcibiade](https://qa.fmod.com/u/Alcibiade)\ **Post date:** [April 12, 2021, 1:03pm UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/2 "2021-04-12T13:03:45Z")
Have you tried to refresh all your assets? Assets tab, right click, refresh selected assets. ---
**Author:** ![filvox](https://avatars.discourse-cdn.com/v4/letter/f/7993a0/32.png) [@filvox](https://qa.fmod.com/u/filvox)\ **Post date:** [April 12, 2021, 1:15pm UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/3 "2021-04-12T13:15:06Z")
Just tried it, error still occurs, unfortunately. ---
**Author:** ![Alcibiade](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/alcibiade/32/4284_2.png) [@Alcibiade](https://qa.fmod.com/u/Alcibiade)\ **Post date:** [April 12, 2021, 1:27pm UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/4 "2021-04-12T13:27:29Z")
Have you tried to remove your build folder? Have you tried to remove/recreate your bank in FMOD (if possible)? ---
**Author:** ![filvox](https://avatars.discourse-cdn.com/v4/letter/f/7993a0/32.png) [@filvox](https://qa.fmod.com/u/filvox)\ **Post date:** [April 12, 2021, 1:51pm UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/5 "2021-04-12T13:51:52Z")
Unfortunately, didn’t work. Also, UE4 displays this error when validating the FMOD plugin. ![ue4](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/0/0debcf444ecdccd0baa9b9d06d303408282634a5.png) ---
**Author:** ![mathew](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/mathew/32/431_2.png) [@mathew](https://qa.fmod.com/u/mathew)\ **Post date:** [April 13, 2021, 12:11am UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/6 "2021-04-13T00:11:21Z")
This is a known issue that will be addressed in the next release: > [@Known issues for 2.01.08](https://qa.fmod.com/t/known-issues-for-2-01-08/16782): > > There are known issues in the FMOD API 2.01.08 release. This can negatively affect users so this post has been made to detail them and provide workarounds. FMOD Studio. Issue #1 : Build error with Convolution Reverb [image] Description : Building banks when using convolution reverb will cause a build error. Platforms: All Resolution : Pressing ignore will continue to build the bank without convolution reverb. Otherwise use 2.01.07 for the time being. This will be fixed in 2.01.09. Issu… ---
**Author:** ![filvox](https://avatars.discourse-cdn.com/v4/letter/f/7993a0/32.png) [@filvox](https://qa.fmod.com/u/filvox)\ **Post date:** [April 13, 2021, 10:19am UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/7 "2021-04-13T10:19:22Z")
Wow, removing the convolution reverb from one of the FX Returns really did work. The issue is solved then! ---
**Author:** ![zsombor.bencsik](https://avatars.discourse-cdn.com/v4/letter/z/ee7513/32.png) [@zsombor.bencsik](https://qa.fmod.com/u/zsombor.bencsik)\ **Post date:** [June 11, 2021, 3:09pm UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/8 "2021-06-11T15:09:58Z")
This issue still persists in 2.01.10. (UE 4.26). I can’t build my master bank unless I remove all the convolution reverb instances. ---
**Author:** ![mathew](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/mathew/32/431_2.png) [@mathew](https://qa.fmod.com/u/mathew)\ **Post date:** [June 14, 2021, 11:10pm UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/9 "2021-06-14T23:10:08Z")
Can you verify the convolution reverb has an IR specified and that the file specified isn’t missing on disk? ---
**Author:** ![zsombor.bencsik](https://avatars.discourse-cdn.com/v4/letter/z/ee7513/32.png) [@zsombor.bencsik](https://qa.fmod.com/u/zsombor.bencsik)\ **Post date:** [July 1, 2021, 12:06pm UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/10 "2021-07-01T12:06:23Z")
It seems that I had one with a missing file. It resolved the issue! ---
**Author:** ![Zajcyk](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/zajcyk/32/592_2.png) [@Zajcyk](https://qa.fmod.com/u/Zajcyk)\ **Post date:** [August 5, 2021, 5:15pm UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/11 "2021-08-05T17:15:26Z")
I had that same issue and when i fill all convolution reverb its resolved. ---
**Author:** ![ciaransykes](https://avatars.discourse-cdn.com/v4/letter/c/59ef9b/32.png) [@ciaransykes](https://qa.fmod.com/u/ciaransykes)\ **Post date:** [September 29, 2021, 11:35pm UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/12 "2021-09-29T23:35:10Z")
I’m getting this issue on 2.02.03. Rolled back to 2.01.12, still get the error. Unfortunately 2.01.07 is the most up to date I can be without two of my banks failing to load. I tried removing all of my convolution reverbs on 2.02.03 but that didn’t help, perhaps I overlooked one of them… Any ideas? Cheers ---
**Author:** ![mathew](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/mathew/32/431_2.png) [@mathew](https://qa.fmod.com/u/mathew)\ **Post date:** [October 1, 2021, 5:55am UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/13 "2021-10-01T05:55:28Z")
You can use the Event Browser filter to find any convolution reverbs, check each to ensure they all have valid IRs. Also check down at the bottom right to Studio in the status bar for any “missing” label regarding assets. ---
**Author:** ![vojtanedved](https://avatars.discourse-cdn.com/v4/letter/v/df788c/32.png) [@vojtanedved](https://qa.fmod.com/u/vojtanedved)\ **Post date:** [November 5, 2021, 11:52am UTC](https://qa.fmod.com/t/failed-to-build-bank-master-due-to-the-following-error-file-not-found-problem/17029/14 "2021-11-05T11:52:06Z")
I had this problem when migrating a project to 2.02.03. I would appreciate if the missing files would be listed in the error message. If this post wasn’t there I could end up looking for solution for hours.