# Linker error with FMOD Studio Unity iOS fmodstudio11009\_v2\_patch2 **URL:** \ **Category:** Unity\ **Created:** [November 16, 2018, 12:29am UTC](https://qa.fmod.com/t/linker-error-with-fmod-studio-unity-ios-fmodstudio11009-v2-patch2/14197 "2018-11-16T00:29:43Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![tbrownjohn\_hh](https://avatars.discourse-cdn.com/v4/letter/t/67e7ee/32.png) [@tbrownjohn\_hh](https://qa.fmod.com/u/tbrownjohn_hh)\ **Post date:** [November 16, 2018, 12:29am UTC](https://qa.fmod.com/t/linker-error-with-fmod-studio-unity-ios-fmodstudio11009-v2-patch2/14197/1 "2018-11-16T00:29:43Z")
When building for iOS with fmodstudio11009\_v2\_patch2.unitypackage integrated I get this build error: 10:59:35 Undefined symbols for architecture arm64: 10:59:35 “\_FMOD5\_DSP\_GetCPUUsage”, referenced from: 10:59:35 \_DSP\_getCPUUsage\_m2393373990\_AdjustorThunk in Bulk\_Assembly-CSharp-firstpass\_0.o 10:59:35 \_DSP\_FMOD5\_DSP\_GetCPUUsage\_m2524030428 in Bulk\_Assembly-CSharp-firstpass\_0.o 10:59:35 (maybe you meant: \_DSP\_FMOD5\_DSP\_GetCPUUsage\_m2524030428) 10:59:35 ld: symbol(s) not found for architecture arm64 10:59:35 clang: error: linker command failed with exit code 1 (use -v to see invocation) If I downgrade to fmodstudio10917\_v2.unitypackage, I am able to build successfully. xcode version = 8.1 iphoneos-version-min = 9.2 ---
**Author:** ![r618](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/r618/32/36_2.png) [@r618](https://qa.fmod.com/u/r618)\ **Post date:** [November 18, 2018, 12:59pm UTC](https://qa.fmod.com/t/linker-error-with-fmod-studio-unity-ios-fmodstudio11009-v2-patch2/14197/2 "2018-11-18T12:59:40Z")
same here / latest Xcode (10.1) commenting out CPUUsage method/s from wrapper allows it to link and run ---
**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\ **Post date:** [November 21, 2018, 2:49am UTC](https://qa.fmod.com/t/linker-error-with-fmod-studio-unity-ios-fmodstudio11009-v2-patch2/14197/3 "2018-11-21T02:49:27Z")
This does appear to be a bug in the integration, and has already been fixed for the next release. In the meantime, to work around this you can do as Martin mentioned and comment out the GetCPUUsage function from the wrapper. ---
**Author:** ![mr.caffeine](https://avatars.discourse-cdn.com/v4/letter/m/b5ac83/32.png) [@mr.caffeine](https://qa.fmod.com/u/mr.caffeine)\ **Post date:** [May 10, 2019, 10:13pm UTC](https://qa.fmod.com/t/linker-error-with-fmod-studio-unity-ios-fmodstudio11009-v2-patch2/14197/4 "2019-05-10T22:13:01Z")
Hello there, the bus is still present in integration version 1.10.12, the workaround works fine. Thanks for your kind assistance Matteo ---
**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\ **Post date:** [May 16, 2019, 4:20am UTC](https://qa.fmod.com/t/linker-error-with-fmod-studio-unity-ios-fmodstudio11009-v2-patch2/14197/5 "2019-05-16T04:20:31Z")
This bug was fixed 1.10.10, if you are still experiencing issues I would delete the currently installed integration files and import a fresh version. ---
**Author:** ![noio](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/noio/32/164_2.png) [@noio](https://qa.fmod.com/u/noio)\ **Post date:** [October 22, 2019, 2:56pm UTC](https://qa.fmod.com/t/linker-error-with-fmod-studio-unity-ios-fmodstudio11009-v2-patch2/14197/6 "2019-10-22T14:56:27Z")
Could this bug have returned in FMOD 2.0 ? I am using FMOD Unity Integration (& Studio) **2.00.05** Just freshly imported the Unity plugin today. ``` Undefined symbols for architecture arm64: "_FMOD_Studio_EventInstance_GetCPUUsage", referenced from: _EventInstance_FMOD_Studio_EventInstance_GetCPUUsage_mA23E8C6222C0442D43191A6A9D7758B56518AF36 in Plugins.FMOD1.o (maybe you meant: _EventInstance_FMOD_Studio_EventInstance_GetCPUUsage_mA23E8C6222C0442D43191A6A9D7758B56518AF36) "_FMOD_Studio_Bus_GetCPUUsage", referenced from: _Bus_FMOD_Studio_Bus_GetCPUUsage_m04E96113EBDD1B696BD1019D0EC5EDC6628062BC in Plugins.FMOD1.o (maybe you meant: _Bus_FMOD_Studio_Bus_GetCPUUsage_m04E96113EBDD1B696BD1019D0EC5EDC6628062BC) ``` `libfmodstudiounityplugin.a` is copied to XCode under `Libraries/Plugins/FMOD/lib/ios` ---
**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\ **Post date:** [October 28, 2019, 10:21pm UTC](https://qa.fmod.com/t/linker-error-with-fmod-studio-unity-ios-fmodstudio11009-v2-patch2/14197/7 "2019-10-28T22:21:06Z")
This is a bug in the 2.00.05 integration, it has been fixed and will go out in the next release. ---
**Author:** ![SweetJP](https://avatars.discourse-cdn.com/v4/letter/s/54ee81/32.png) [@SweetJP](https://qa.fmod.com/u/SweetJP)\ **Post date:** [November 20, 2019, 1:44pm UTC](https://qa.fmod.com/t/linker-error-with-fmod-studio-unity-ios-fmodstudio11009-v2-patch2/14197/8 "2019-11-20T13:44:22Z")
Installed 2.00.05 integration in our project and ran into this! Is the fastest workaround to roll back the project to before integration and add a working integration or is there some other way? edit. So this bug is not present in 2.00.04? ---
**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\ **Post date:** [November 20, 2019, 9:33pm UTC](https://qa.fmod.com/t/linker-error-with-fmod-studio-unity-ios-fmodstudio11009-v2-patch2/14197/9 "2019-11-20T21:33:31Z")
This is a bug in 2.00.05, you can either roll back to 2.00.04 or update to 2.00.06. ---
**Author:** ![SweetJP](https://avatars.discourse-cdn.com/v4/letter/s/54ee81/32.png) [@SweetJP](https://qa.fmod.com/u/SweetJP)\ **Post date:** [November 24, 2019, 6:05pm UTC](https://qa.fmod.com/t/linker-error-with-fmod-studio-unity-ios-fmodstudio11009-v2-patch2/14197/10 "2019-11-24T18:05:15Z")
Cool, thanks!