# ERR\_INVALID\_HANDLE on createStream() on Linux **URL:** \ **Category:** FMOD Engine\ **Tags:** linux, csharp\ **Created:** [January 31, 2021, 2:10pm UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707 "2021-01-31T14:10:59Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![gn.fur](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/gn.fur/32/1129_2.png) [@gn.fur](https://qa.fmod.com/u/gn.fur)\ **Post date:** [January 31, 2021, 2:10pm UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/1 "2021-01-31T14:10:59Z")
When I call createSound() on Linux, it returns ERR\_INVALID\_HANDLE. Windows and Android work fine. I am using 12.7 version of FMOD. My code: ``` public static Sound LoadStreamedSound(string path) { var buffer = FileLoader.LoadFileAsBuffer(path); // Internal FMOD pointer points to this memory, so we don't want it to go anywhere. var handle = GCHandle.Alloc(buffer, GCHandleType.Pinned); var info = new FMOD.CREATESOUNDEXINFO(); info.length = (uint)buffer.Length; info.cbsize = Marshal.SizeOf(info); var r = Native.createStream( buffer, FMOD.MODE.OPENMEMORY | FMOD.MODE.CREATESTREAM, ref info, out FMOD.Sound newSound ); Console.WriteLine("LOAD RESULTS:" + r); // ERR_INVALID_HANDLE return new Sound(newSound, buffer, handle); } ``` ---
**Author:** ![gn.fur](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/gn.fur/32/1129_2.png) [@gn.fur](https://qa.fmod.com/u/gn.fur)\ **Post date:** [January 31, 2021, 2:21pm UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/2 "2021-01-31T14:21:11Z")
Tested some more – and this behavior only happens if I initialize FMOD Studio (which wortks fine by itself). If I just initialize Core library, everything works as intended. ---
**Author:** ![gn.fur](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/gn.fur/32/1129_2.png) [@gn.fur](https://qa.fmod.com/u/gn.fur)\ **Post date:** [January 31, 2021, 2:25pm UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/3 "2021-01-31T14:25:10Z")
This is how I initialize: ``` FMOD.INITFLAGS coreInitFlags = FMOD.INITFLAGS.CHANNEL_LOWPASS | FMOD.INITFLAGS.CHANNEL_DISTANCEFILTER; FMOD.Studio.INITFLAGS studioInitFlags = FMOD.Studio.INITFLAGS.NORMAL; var r = FMOD.Studio.System.create(out StudioSystem.Native); Console.WriteLine("STUDIO CREATE: " + r); r = StudioSystem.Native.getCoreSystem(out CoreSystem.Native); Console.WriteLine("CORE SYSTEM: " + r); // This also will init core system. StudioSystem.Native.initialize(maxChannels, studioInitFlags, coreInitFlags, (IntPtr)0); ``` ---
**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:** [February 3, 2021, 3:42am UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/4 "2021-02-03T03:42:19Z")
Can you try the logging version of FMOD instead, you should get some information output on the TTY as to what is going wrong. ---
**Author:** ![gn.fur](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/gn.fur/32/1129_2.png) [@gn.fur](https://qa.fmod.com/u/gn.fur)\ **Post date:** [February 6, 2021, 3:41pm UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/5 "2021-02-06T15:41:08Z")
Tried the logger library. This is what it outputted in the console (along with some dotnet stuff). There isn’t anything out of ordinary, it seems. I see some thread permission errors, tho. Running with sudo fixes them, but my game crashes anyway with same error. [LOG] System::create : Header version = 2.01.07. Current version = 2.01.07. STUDIO CREATE: OK fmodstudioL | CORE SYSTEM: OK fmodstudioL | [LOG] Manager::init : maxchannels = 256 studioflags = 00000000 flags 00000300 extradriverdata (nil). [LOG] SystemI::init : Initialize version=20107 (113487), maxchannels=256, flags=0x00020300 [LOG] SystemI::setOutputInternal : Setting output to ‘FMOD PulseAudio Output’ [LOG] OutputPulseAudio::registerLib : Loaded PulseAudio version 13.99.0. [LOG] OutputPulseAudio::enumOutput : Found output device NAME:alsa\_output.pci-0000\_00\_05.0.analog-stereo DESC:Built-in Audio Analog Stereo CHANNELS:2 RATE:48000. [LOG] OutputPulseAudio::enumInput : Found input device NAME:alsa\_output.pci-0000\_00\_05.0.analog-stereo.monitor DESC:Monitor of Built-in Audio Analog Stereo CHANNELS:2 RATE:48000. [LOG] OutputPulseAudio::enumInput : Found input device NAME:alsa\_input.pci-0000\_00\_05.0.analog-stereo DESC:Built-in Audio Analog Stereo CHANNELS:2 RATE:44100. [LOG] Thread::initThread : Init FMOD stream thread. Affinity: 0x8000000000000003, Priority: 0xFFFF7FFB, Stack Size: 98304, Semaphore: No, Sleep Time: 10, Looping: Yes. [WRN] FMOD\_OS\_Thread\_Callback : Cannot set real-time thread priorities due to insufficient privileges [LOG] Thread::initThread : Init FMOD mixer thread. Affinity: 0x8000000000000001, Priority: 0xFFFF7FFA, Stack Size: 81920, Semaphore: Yes, Sleep Time: 0, Looping: Yes. [WRN] FMOD\_OS\_Thread\_Callback : Cannot set real-time thread priorities due to insufficient privileges [LOG] AsyncManager::init : manager 0xd635f8 isAsync 1 updatePeriod 0.02 [LOG] Thread::initThread : Init FMOD Studio update thread. Affinity: 0x8000000000000002, Priority: 0xFFFF7FFD, Stack Size: 98304, Semaphore: No, Sleep Time: 1, Looping: No. [WRN] OutputPulseAudio::streamUnderflowCallback : Buffer underrun detected in PulseAudio. [LOG] OutputPulseAudio::streamUnderflowCallback : Increasing buffer size - new block count = 5. [WRN] FMOD\_OS\_Thread\_Callback : Cannot set real-time thread priorities due to insufficient privileges [LOG] AsyncManager::init : done [LOG] PlaybackSystem::init : [LOG] Thread::initThread : Init FMOD Studio sample load thread. Affinity: 0x8000000000000003, Priority: 0xFFFF7FFD, Stack Size: 98304, Semaphore: No, Sleep Time: 1, Looping: No. [WRN] FMOD\_OS\_Thread\_Callback : Cannot set real-time thread priorities due to insufficient privileges [LOG] PlaybackSystem::init : done [LOG] Thread::initThread : Init FMOD Studio bank load thread. Affinity: 0x8000000000000003, Priority: 0xFFFF7FFD, Stack Size: 98304, Semaphore: No, Sleep Time: 1, Looping: No. [WRN] FMOD\_OS\_Thread\_Callback : Cannot set real-time thread priorities due to insufficient privileges [LOG] Manager::init : done. fmodL | fmodstudioL | fmodL | fmodL | fmodL | PLAY RESULTS:ERR\_INVALID\_HANDLE | FMOD.Channel fmodL | fmodL | Unhandled exception. System.NullReferenceException: Object reference not set to an instance of an object. at ChaiFoxes.FMODAudio.Channel…ctor(Sound sound, Channel channel) in D:\_Projects\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio.Shared\Channel.cs:line 402 at ChaiFoxes.FMODAudio.Sound.Play(ChannelGroup group, Boolean paused) in D:\_Projects\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio.Shared\Sound.cs:line 255 at ChaiFoxes.FMODAudio.Sound.Play(Boolean paused) in D:\_Projects\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio.Shared\Sound.cs:line 244 at ChaiFoxes.FMODAudio.Demos.Scenes.CoreDemoScene.Enter() in D:\_Projects\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio.Demos\ChaiFoxes.FMODAudio.Demos\Scenes\CoreDemoScene.cs:line 40 at ChaiFoxes.FMODAudio.Demos.Scenes.SceneController.ChangeScene(Scene scene) in D:\_Projects\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio.Demos\ChaiFoxes.FMODAudio.Demos\Scenes\SceneController.cs:line 22 at ChaiFoxes.FMODAudio.Demos.Scenes.DemoSelectorScene.\<\>c.b\_\_3\_2() in D:\_Projects\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio.Demos\ChaiFoxes.FMODAudio.Demos\Scenes\DemoSelectorScene.cs:line 32 at ChaiFoxes.FMODAudio.Demos.UI.Button.Update() in D:\_Projects\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio.Demos\ChaiFoxes.FMODAudio.Demos\UI\Button.cs:line 54 at ChaiFoxes.FMODAudio.Demos.UI.UIController.Update() in D:\_Projects\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio.Demos\ChaiFoxes.FMODAudio.Demos\UI\UIController.cs:line 27 at ChaiFoxes.FMODAudio.Demos.Game1.Update(GameTime gameTime) in D:\_Projects\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio.Demos\ChaiFoxes.FMODAudio.Demos\Game1.cs:line 106 at Microsoft.Xna.Framework.Game.DoUpdate(GameTime gameTime) at Microsoft.Xna.Framework.Game.Tick() at Microsoft.Xna.Framework.SdlGamePlatform.RunLoop() at Microsoft.Xna.Framework.Game.Run(GameRunBehavior runBehavior) at ChaiFoxes.FMODAudio.Demos.DesktopGL.Program.Main() in D:\_Projects\ChaiFoxes.FMODAudio\ChaiFoxes.FMODAudio.Demos\ChaiFoxes.FMODAudio.Demos.DesktopGL\Program.cs:line 11 Aborted (core dumped) ---
**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:** [February 8, 2021, 2:44am UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/6 "2021-02-08T02:44:19Z")
According to your output I see: PLAY RESULTS:ERR\_INVALID\_HANDLE | FMOD.Channel However I don’t see any LOAD RESULTS: Also, in the log I don’t see any Sounds being loaded by FMOD, is it possible the load isn’t being called at all? ---
**Author:** ![gn.fur](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/gn.fur/32/1129_2.png) [@gn.fur](https://qa.fmod.com/u/gn.fur)\ **Post date:** [February 8, 2021, 10:23am UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/7 "2021-02-08T10:23:17Z")
That’s because I don’t output them. Load results are OK. Besides, it works on both Windows and Android. I’ll doublecheck when I’ll get home. ---
**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:** [February 9, 2021, 12:53am UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/8 "2021-02-09T00:53:58Z")
Regardless of the LOAD RESULTS, there should also be logging from FMOD when you create a sound which appears to be missing unless you snipped it out of the log provided? ---
**Author:** ![gn.fur](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/gn.fur/32/1129_2.png) [@gn.fur](https://qa.fmod.com/u/gn.fur)\ **Post date:** [September 19, 2022, 12:53am UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/9 "2022-09-19T00:53:44Z")
A year and a half later, I am finally returning to this problem. : D Yes, it is indeed missing. The sound load logs appear when I use core-only mode - then everything works fine. I have updated to the latest version of FMOD, the problem still persists. ---
**Author:** ![gn.fur](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/gn.fur/32/1129_2.png) [@gn.fur](https://qa.fmod.com/u/gn.fur)\ **Post date:** [September 19, 2022, 1:12am UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/10 "2022-09-19T01:12:23Z")
My current logs: ```auto Loading libfmodstudioL.so [LOG] System::create : Header version = 2.02.08. Current version = 2.02.08. +STUDIO: OK Loading libfmodstudioL.so +CORE: OK Loading libfmodstudioL.so [LOG] Manager::init : maxchannels = 256 studioflags = 00000000 flags 00000000 extradriverdata (nil). [LOG] SystemI::init : Initialize version=20208 (126901), maxchannels=256, flags=0x00020000 [LOG] SystemI::setOutputInternal : Setting output to 'FMOD PulseAudio Output' [LOG] OutputPulseAudio::registerLib : Loaded PulseAudio version 15.99.0. [LOG] PulseAudio_EnumOutputCallback : Found output device NAME:alsa_output.pci-0000_00_05.0.analog-stereo DESC:Built-in Audio Analog Stereo CHANNELS:2 RATE:48000. [LOG] PulseAudio_EnumInputCallback : Found input device NAME:alsa_output.pci-0000_00_05.0.analog-stereo.monitor DESC:Monitor of Built-in Audio Analog Stereo CHANNELS:2 RATE:48000. [LOG] PulseAudio_EnumInputCallback : Found input device NAME:alsa_input.pci-0000_00_05.0.analog-stereo DESC:Built-in Audio Analog Stereo CHANNELS:2 RATE:48000. [LOG] Thread::initThread : Init FMOD stream thread. Affinity: 0x4000000000000003, Priority: 0xFFFF7FFB, Stack Size: 98304, Semaphore: No, Sleep Time: 10, Looping: Yes. [LOG] FMOD_OS_Thread_Callback : Cannot set real-time thread priorities due to insufficient privileges [LOG] Thread::initThread : Init FMOD mixer thread. Affinity: 0x4000000000000001, Priority: 0xFFFF7FFA, Stack Size: 81920, Semaphore: No, Sleep Time: 0, Looping: Yes. [LOG] FMOD_OS_Thread_Callback : Cannot set real-time thread priorities due to insufficient privileges [LOG] AsyncManager::init : manager 0x556c0f7f4df8 isAsync 1 updatePeriod 0.02 [LOG] Thread::initThread : Init FMOD Studio update thread. Affinity: 0x4000000000000002, Priority: 0xFFFF7FFD, Stack Size: 98304, Semaphore: No, Sleep Time: 1, Looping: No. [LOG] FMOD_OS_Thread_Callback : Cannot set real-time thread priorities due to insufficient privileges [LOG] AsyncManager::init : done [LOG] PlaybackSystem::init : [LOG] Thread::initThread : Init FMOD Studio sample load thread. Affinity: 0x4000000000000003, Priority: 0xFFFF7FFD, Stack Size: 98304, Semaphore: No, Sleep Time: 1, Looping: No. [LOG] FMOD_OS_Thread_Callback : Cannot set real-time thread priorities due to insufficient privileges [LOG] PlaybackSystem::init : done [LOG] Thread::initThread : Init FMOD Studio bank load thread. Affinity: 0x4000000000000003, Priority: 0xFFFF7FFD, Stack Size: 98304, Semaphore: No, Sleep Time: 1, Looping: No. [LOG] FMOD_OS_Thread_Callback : Cannot set real-time thread priorities due to insufficient privileges [LOG] Manager::init : done. Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so +SOUND LOAD RESULT: ERR_INVALID_HANDLE Loading libfmodL.so Loading libfmodL.so +SOUND PLAY RESULT: ERR_INVALID_HANDLE Loading libfmodL.so Loading libfmodL.so ``` And here are the logs in core-only mode, when everything is working as expected: ```auto Loading libfmodL.so Loading libfmodL.so [LOG] SystemI::init : Initialize version=20208 (126901), maxchannels=256, flags=0x00000000 [LOG] SystemI::setOutputInternal : Setting output to 'FMOD PulseAudio Output' [LOG] OutputPulseAudio::registerLib : Loaded PulseAudio version 15.99.0. [LOG] PulseAudio_EnumOutputCallback : Found output device NAME:alsa_output.pci-0000_00_05.0.analog-stereo DESC:Built-in Audio Analog Stereo CHANNELS:2 RATE:48000. [LOG] PulseAudio_EnumInputCallback : Found input device NAME:alsa_output.pci-0000_00_05.0.analog-stereo.monitor DESC:Monitor of Built-in Audio Analog Stereo CHANNELS:2 RATE:48000. [LOG] PulseAudio_EnumInputCallback : Found input device NAME:alsa_input.pci-0000_00_05.0.analog-stereo DESC:Built-in Audio Analog Stereo CHANNELS:2 RATE:48000. [LOG] Thread::initThread : Init FMOD stream thread. Affinity: 0x4000000000000003, Priority: 0xFFFF7FFB, Stack Size: 98304, Semaphore: No, Sleep Time: 10, Looping: Yes. [LOG] FMOD_OS_Thread_Callback : Cannot set real-time thread priorities due to insufficient privileges [LOG] Thread::initThread : Init FMOD mixer thread. Affinity: 0x4000000000000001, Priority: 0xFFFF7FFA, Stack Size: 81920, Semaphore: No, Sleep Time: 0, Looping: Yes. [LOG] FMOD_OS_Thread_Callback : Cannot set real-time thread priorities due to insufficient privileges Loading libfmodL.so Loading libfmodL.so [LOG] SystemI::createSoundInternal : Create data=0x7fa1ec061928, mode=0x00000880 [LOG] SystemI::createSoundInternal : exinfo->cbsize = 224 [LOG] SystemI::createSoundInternal : exinfo->length = 15263 [LOG] SystemI::createSoundInternal : Stream: name='(null)', format=2, channels=2, frequency=44100, lengthbytes=15263, lengthpcm=88200, pcmblocksize=0, loopstart=0, loopend=0, mode=0x00000000, channelmask=0x00000000, channelorder=0, peakvolume=0.000000. +SOUND LOAD RESULT: OK Loading libfmodL.so Loading libfmodL.so +SOUND PLAY RESULT: OK Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so Loading libfmodL.so ``` ---
**Author:** ![gn.fur](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/gn.fur/32/1129_2.png) [@gn.fur](https://qa.fmod.com/u/gn.fur)\ **Post date:** [September 19, 2022, 1:19am UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/11 "2022-09-19T01:19:50Z")
Also here’s the source code in question. The place where I load the sound. > The inside of the method. > Initialization. > ---
**Author:** ![gn.fur](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/gn.fur/32/1129_2.png) [@gn.fur](https://qa.fmod.com/u/gn.fur)\ **Post date:** [September 19, 2022, 7:32pm UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/12 "2022-09-19T19:32:42Z")
UPDATE: It seems I have found the solution? Or at least a fix that seems to do the job. If I initialize Core system before the Studio system, both seem to work. I wasn’t initializing Core system at all in Studio mode, as far am I am aware, Studio system also inits Core system - and this seems to be the case on all other platforms. ```auto FMOD.Factory.System_Create(out CoreSystem.Native); FMOD.Studio.System.create(out StudioSystem.Native); ``` Could somebody from FMOD comment on this? Am I missing something here? ---
**Author:** ![jeff\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/jeff_fmod/32/1766_2.png) [@jeff\_fmod](https://qa.fmod.com/u/jeff_fmod)\ **Post date:** [September 19, 2022, 11:24pm UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/13 "2022-09-19T23:24:18Z")
There is a [requirement](https://fmod.com/docs/2.02/api/studio-guide.html#getting-started) when using C# to call into the Core API before calling `FMOD.Studio.System.create`. This is due to a limitation with dependency loading in the C# runtime. Any call into the Core API would satisfy this criteria. In our Unity integration for example we call `FMOD.Memory.GetStats` as an innocuous and relatively low overhead way to meet this requirement. To confirm this is the issues can you please try calling `FMOD.Memory.GetStats` and see if that gives you the same result? ---
**Author:** ![gn.fur](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/gn.fur/32/1129_2.png) [@gn.fur](https://qa.fmod.com/u/gn.fur)\ **Post date:** [September 20, 2022, 11:25am UTC](https://qa.fmod.com/t/err-invalid-handle-on-createstream-on-linux/16707/14 "2022-09-20T11:25:21Z")
Yep. I replaced create with `FMOD.Memory.GetStats(out var currentallocated, out var maxallocated);` and got the same result. Thanks for the explanation.