AudioKit unexpected crash ios with swift on AKOscillator - [AKOscillator operationName]: unrecognized selector sent to instance -

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i receiving strange crash when using audiokit build swift based ios 8 application. followed videos , able build , launch audiokit based project using bridging header, etc. in main viewcontroller, have following code based on hello world example:

override func viewdidload() {   super.viewdidload()   let inst = akinstrument()    //let oscillator = akoscillator()   //inst.setaudiooutput(oscillator)   //akorchestra.addinstrument(inst)   //inst.play() }

that runs fine, second uncomment lines below initializing akinstrument, crash shortly after app launches:

    0dbfs level = 32768.0     csound version 6.05 (float samples) aug  6 2015     libsndfile-1.0.26pre6         2015-10-22 11:19:15.024 nilg5[1281:37425] 1 midi sources     2015-10-22 11:19:15.025 nilg5[1281:37425] midi source 0: session 1     440.0     2015-10-22 11:19:16.072 nilg5[1281:36836] -[akoscillator operationname]: unrecognized selector sent instance 0x7fb6904b78b0     2015-10-22 11:19:16.160 nilg5[1281:36836] *** terminating app due uncaught exception 'nsinvalidargumentexception', reason: '-[akoscillator operationname]: unrecognized selector sent instance 0x7fb6904b78b0'     *** first throw call stack:     (         0   corefoundation                      0x0000000110094c65 __exceptionpreprocess + 165         1   libobjc.a.dylib                     0x0000000111c64bb7 objc_exception_throw + 45         2   corefoundation                      0x000000011009c0ad -[nsobject(nsobject) doesnotrecognizeselector:] + 205         3   corefoundation                      0x000000010fff213c ___forwarding___ + 988         4   corefoundation                      0x000000010fff1cd8 _cf_forwarding_prep_0 + 120         5   nilg5                               0x000000010f43d14b -[akoscillator init] + 43         6   nilg5                               0x000000010f430790 _ttofcso12akoscillatorcfms_ft_s_ + 16         7   nilg5                               0x000000010f42c2c7 _tfcso12akoscillatorcfms_ft_s_ + 71         8   nilg5                               0x000000010f42b564 _tfc5nilg514viewcontroller11viewdidloadfs0_ft_t_ + 308         9   nilg5                               0x000000010f42b6e2 _ttofc5nilg514viewcontroller11viewdidloadfs0_ft_t_ + 34         10  uikit                               0x0000000110ac91d0 -[uiviewcontroller loadviewifrequired] + 738         11  uikit                               0x0000000110ac93ce -[uiviewcontroller view] + 27         12  uikit                               0x00000001109e4289 -[uiwindow addrootviewcontrollerviewifpossible] + 58         13  uikit                               0x00000001109e464f -[uiwindow _sethidden:forced:] + 247         14  uikit                               0x00000001109f0de1 -[uiwindow makekeyandvisible] + 42         15  uikit                               0x0000000110994417 -[uiapplication _callinitializationdelegatesformainscene:transitioncontext:] + 2732         16  uikit                               0x000000011099719e -[uiapplication _runwithmainscene:transitioncontext:completion:] + 1349         17  uikit                               0x0000000110996095 -[uiapplication workspacedidendtransaction:] + 179         18  frontboardservices                  0x0000000116ce95e5 __31-[fbsserialqueue performasync:]_block_invoke_2 + 21         19  corefoundation                      0x000000010ffc841c __cfrunloop_is_calling_out_to_a_block__ + 12         20  corefoundation                      0x000000010ffbe165 __cfrunloopdoblocks + 341         21  corefoundation                      0x000000010ffbdf25 __cfrunlooprun + 2389         22  corefoundation                      0x000000010ffbd366 cfrunlooprunspecific + 470         23  uikit                               0x0000000110995b02 -[uiapplication _run] + 413         24  uikit                               0x00000001109988c0 uiapplicationmain + 1282         25  nilg5                               0x000000010f430ee7 main + 135         26  libdyld.dylib                       0x00000001123a6145 start + 1         27  ???                                 0x0000000000000001 0x0 + 1     )     libc++abi.dylib: terminating uncaught exception of type nsexception     (lldb)

seems complaining [akoscillator operationname]: unrecognized selector sent instance 0x7fb6904b78b0 ... docs allow initialize akoscillator without parameters...

not sure, ideas??


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