Question

Problem:
Studio One 3.3 crashes on exit of the application, doesn't matter if it's an empty project, a huge song with multiple VSTs, or a new song instance with only one track and no VSTs added. It always crashes on exit and throws this weird "QuickTIme" crash log (see below). Is there anyway to tell PSO to STOP loading Quicktime at all? I don't work with video, so this is totally unnecessary anyway.

Setup:

MacPro Tower (Early 2008)

OSX 10.8.6 (I can't upgrade further due to older VST compatibility, and for the most part this rig is super stable)

MOTU UltraLite

Crash Log:

Process:         studioapp [10081]
Path:            /Applications/Studio One 3.app/Contents/MacOS/studioapp
Identifier:      com.presonus.studioone2
Version:         3.3.3 Build 41198 (3.3.3)
Code Type:       X86 (Native)
Parent Process:  launchd [146]
User ID:         501

Date/Time:       2017-04-02 11:45:35.618 -0700
OS Version:      Mac OS X 10.8.5 (12F2560)
Report Version:  10

Interval Since Last Report:          571713 sec
Crashes Since Last Report:           65
Per-App Interval Since Last Report:  222067 sec
Per-App Crashes Since Last Report:   12
Anonymous UUID:                      731053E4-C3CC-CFC4-4029-89A06798EE35

Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000000e1c32f2

VM Regions Near 0xe1c32f2:
    __LINKEDIT             000000000e0c3000-000000000e0d7000 [   80K] r--/rwx SM=COW  /Library/QuickTime/DVCPROHDMuxer.component/Contents/MacOS/DVCPROHDMuxer
-->
    Memory tag=250         000000000e481000-000000000e491000 [   64K] rwx/rwx SM=PRV  

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   ???                               0x0e1c32f2 0 + 236729074
1   com.apple.CoreFoundation          0x918352f8 __CFRunLoopSourceHash + 24
2   com.apple.CoreFoundation          0x9180e984 __CFSetStandardHashKey + 36
3   com.apple.CoreFoundation          0x91812e1f __CFBasicHashRehash + 2127
4   com.apple.CoreFoundation          0x91830a36 CFBasicHashRemoveValue + 2598
5   com.apple.CoreFoundation          0x9184271e CFRunLoopRemoveSource + 190
6   com.motu.driver.FWA.HALPlugin     0x0de631d4 PlugIn::RunLoopChanged(__CFRunLoop*) + 196
7   com.motu.driver.FWA.HALPlugin     0x0de6464d PlugIn::~PlugIn() + 45
8   com.motu.driver.FWA.HALPlugin     0x0de6302f PlugIn::Destroy::~Destroy() + 31
9   libsystem_c.dylib                 0x9121146a __cxa_finalize + 184
10  libsystem_c.dylib                 0x91212db2 exit + 23
11  libdyld.dylib                     0x9268272d start + 8

Answer 1

It looks like a MOTU plug-in is causing this issue. 

6   com.motu.driver.FWA.HALPlugin     0x0de631d4 PlugIn::RunLoopChanged(__CFRunLoop*) + 196 
7   com.motu.driver.FWA.HALPlugin     0x0de6464d PlugIn::~PlugIn() + 45 
8   com.motu.driver.FWA.HALPlugin     0x0de6302f PlugIn::Destroy::~Destroy() + 31 

In case this is not the issue, please go into Studio One > Preferences > Advanced > Services and disable your ARA, AU, VST, VST3, and ReWire services. See if you can find a correlation to the crash and a particular service. This would help to identify the source of the problem.

With all the services disabled: 

1. Enable a service, and test if the issue remains
2. Enable another service and test if the issue remains
3. Keep doing this until you find which service the issue lies in.

Once you can narrow down the service, it should be easy to find the culprit plug-in, that plug-in may need to be reinstalled or updated. Also, if that plug uses iLok or Pace, update the security too.

---

As far as Quicktime goes, Studio One 3 no longer has a Quicktime video service support. If you are not doing any video, you can also disable the Video Support service in Studio One > Preferences > Advanced > Services. Video Services

Try removing your settings from the program in the event that something is corrupt.

1. Go to Help>Open Settings folder.

2. Copy the contents of the folder over to a folder on your desktop.

3. Close S1 and delete the contents of the settings folder with the exception of the user.license file.

4. Open S1 and go to Studio One>Prerefences to reconfigure your settings.

5. Test to see if the problem is resolved. If it is not, please feel free to copy your settings files back over from the backup that you created in step 2.

*If you are missing presets or Sound Sets after doing this, simply double-click one of your Sound Sets under Documents>Studio One>Sound Sets.