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[eagebhart]

I am currently using MC 19 on Mavericks. 
I have bought MC 20 and MC 21 but both crash way more often than MC 19. 

With MC 19 I know the only crash happens when dragging a song to the end of a list, so I don't do that.

1. Is it expected that MC 20 and MC 21 have better behavior than this? I find them completely unusable.
2. Is it that they have more features than MC 19?

They never worked long enough for me to find out.

3. My last question is, are all of three of these versions expected to work on Yosemite and El Capitan?

I wouldn't mind the upgrade but I'm fearful that MC 19 will stop working, and I'll be left with trying to find a new music player.

[JimH]

Crashes aren't normal at all.  Make sure you're using the latest version available.  MC21 is on the Download Page.

[eagebhart]

I have always used the latest revision of each version I have tried.

[blgentry]

MC has crashed on me a few times.  Maybe 6 or 8 times in a year, roughly.  I consider a crash to be very abnormal.  If you see frequent crashes, something is wrong for sure.

Tell us a little more about your setup.  Capture a crash report the next time MC crashes and send it in here.  Hopefully someone can help diagnose the problem.

Brian.

[Antoine.]

Same here: MC21.08 constantly crashing to the point where it is absolutely unusable (running latest version registered with a Master License, on Yosemite, MacBook Pro mid-2009).

It tries to open tons of new MC windows (new icons keep appearing in the taskbar) right from the start, when nothing is playing.

[JimH]

Please post the version you're using.

[blgentry]

Antoine:  Try to disable auto import and see if it still crashes.  It sounds like MC *might* be hitting some bad files and crashing.

Tools > Options > Library & Folders > run auto import in background > (uncheck)

Brian.

[eagebhart]

I'm using 19.0.163  - which reliably crashes when dragging a file to the end of a playlist.  There is no traceback.

Here is the crash for media center 20.  The crash is in a sub process, and it pops up every minute or so.
All of my music is already imported from the same place media center 19 is using.

It looks like the crash is on an audio video format. I find that strange since I do not have any videos in my music folder.

the crash along with the loss of all of my views, playlists and everything else creates a big barrier to changing from media center 19.

Process:         JRWorker [45648]
Path:            /Applications/Media Center 20.app/Contents/MacOS/JRWorker
Identifier:      com.jriver.MediaCenter20
Version:         20.0.126 (?)
Code Type:       X86-64 (Native)
Parent Process:  Media Center 20 [45638]
Responsible:     Media Center 20 [45638]
User ID:         501

Date/Time:       2015-10-05 13:06:15.353 -0400
OS Version:      Mac OS X 10.9.5 (13F1096)
Report Version:  11
Anonymous UUID:  6C8CAC65-15AB-3C2E-8964-470A278EBA78

Sleep/Wake UUID: A854ACC7-8DDF-42DB-B85A-BDB99B6DE52D

Crashed Thread:  15

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000113e25000

VM Regions Near 0x113e25000:
    VM_ALLOCATE            0000000113c94000-0000000113e25000 [ 1604K] rw-/rwx SM=PRV  
-->
    CG shared images       00000001c0003000-00000001c000b000 [   32K] r--/r-- SM=SHM  

Thread 0:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib           0x00007fff90880716 __psynch_cvwait + 10
1   libsystem_pthread.dylib          0x00007fff8aba2c3b _pthread_cond_wait + 727
2   JRWorker                         0x000000010000dfea CJRThumbGrabber::SeekAndGrab(long long) + 236
3   JRWorker                         0x000000010000e04a CJRThumbGrabber::GetThumbnail(JRPtr<IJRImage, IJRImage>&, long long) + 28
4   JRWorker                         0x0000000100012e96 CJRVideoThumbHelper::GetThumbnailJR() + 414
5   JRWorker                         0x0000000100012b8a CJRVideoThumbHelper::GetThumbnail(JRString const&, JRString const&, JRString const&, JRString const&, int) + 756
6   JRWorker                         0x0000000100002bc4 JRWorkerApp::ProcessCommand(JRCommandLine) + 2992
7   JRWorker                         0x0000000100001fc3 JRWorkerApp::Run() + 41
8   JRWorker                         0x00000001000a7b58 JRApp::CommandLineMain() + 28
9   JRWorker                         0x0000000100001ed4 start + 52

Thread 1:
0   libsystem_kernel.dylib           0x00007fff90880e6a __workq_kernreturn + 10
1   libsystem_pthread.dylib          0x00007fff8aba1f08 _pthread_wqthread + 330
2   libsystem_pthread.dylib          0x00007fff8aba4fb9 start_wqthread + 13


Thread 15 Crashed:
0   libsystem_platform.dylib         0x00007fff87b5209a _platform_memmove$VARIANT$Nehalem + 186
1   libJRImage.dylib                 0x0000000113864d62 JRImage::Create(IJRImage const*) + 200
2   JRWorker                         0x000000010000de6c CJRThumbGrabber::Receive(JRVideoFrame&) + 316
3   libJRPlayer.dylib                0x000000011102b98e CJRMediaStreamVideo::Decode(AVPacket*) + 1144
4   libJRPlayer.dylib                0x000000011102b2dc CJRMediaStreamBase::Thread() + 278
5   libJRPlayer.dylib                0x0000000110e90fae JRThread::StaticThread(void*) + 104
6   libsystem_pthread.dylib          0x00007fff8aba0899 _pthread_body + 138
7   libsystem_pthread.dylib          0x00007fff8aba072a _pthread_start + 137
8   libsystem_pthread.dylib          0x00007fff8aba4fc9 thread_start + 13

Thread 15 crashed with X86 Thread State (64-bit):
  rax: 0x0000000113c94008  rbx: 0x000000010c311b20  rcx: 0x0000000000000008  rdx: 0x00000000000003b8
  rdi: 0x0000000113e24fd0  rsi: 0x0000000113845008  rbp: 0x000000011303e830  rsp: 0x000000011303e830
   r8: 0x0000000000000000   r9: 0x0000000000000000  r10: 0x0000000000001002  r11: 0x00000000005e0008
  r12: 0x00000001136b4000  r13: 0x0000000113864ac6  r14: 0x000000010c311c60  r15: 0x0000000113c94008
  rip: 0x00007fff87b5209a  rfl: 0x0000000000010206  cr2: 0x0000000113e25000
  
Logical CPU:     2
Error Code:      0x00000006
Trap Number:     14


Binary Images:
       0x100000000 -        0x10010aff7 +JRWorker (?) <43F78EF7-E853-332F-8208-85553BA666C4> /Applications/Media Center 20.app/Contents/MacOS/JRWorker
       0x106e73000 -        0x106eb0fff +libavutil-jr.54.dylib (54.23.101) <9C915420-57A6-3A3C-A748-14F3D9FFC4E0> /Users/USER/Library/Application Support/J River/*/libavutil-jr.54.dylib
       0x107800000 -        0x107b5dfef +libJRTools.dylib (1) <9BCBD564-F45D-393F-8C96-0392FBC4866A> /Applications/Media Center 20.app/Contents/MacOS/libJRTools.dylib
       0x10c400000 -        0x10c587fff +libJRReader.dylib (1) <7081A6B7-A024-35F1-A3DE-D8371E168E9F> /Applications/Media Center 20.app/Contents/MacOS/libJRReader.dylib
       0x110e00000 -        0x11112ffff +libJRPlayer.dylib (1) <C0D02548-672C-3DA2-90E9-0A3A566132C8> /Applications/Media Center 20.app/Contents/MacOS/libJRPlayer.dylib
       0x111312000 -        0x111e39fe7 +libavcodec-jr.56.dylib (56.35.101) <9A395438-39CB-3D90-91E6-97CB31CCE92B> /Users/USER/Library/Application Support/J River/*/libavcodec-jr.56.dylib
       0x112623000 -        0x11279bfff +libavformat-jr.56.dylib (56.30.100) <C5B2894E-A887-374D-83EE-ED6F22DF651D> /Users/USER/Library/Application Support/J River/*/libavformat-jr.56.dylib
       0x1127eb000 -        0x112861ff7 +libswscale-jr.3.dylib (3.1.101) <94E9BA16-9EF0-3E12-82FA-DB012FDF4E75> /Users/USER/Library/Application Support/J River/*/libswscale-jr.3.dylib
       0x113846000 -        0x113aebfff +libJRImage.dylib (1) <D3590BC9-85C7-3880-9FDA-6BC118A8598E> /Applications/Media Center 20.app/Contents/MacOS/libJRImage.dylib
    0x7fff6596a000 -     0x7fff6599d817  dyld (239.4) <7AD43B9B-5CEA-3C7E-9836-A06909F9CA56> /usr/lib/dyld
    0x7fff85f9e000 -     0x7fff85fa2ff7  libsystem_stats.dylib (93.90.3) <4E51D5B0-92A0-3D0D-B90E-495A1ED3E391> /usr/lib/system/libsystem_stats.dylib
    0x7fff85fa3000 -     0x7fff86188fff  com.apple.CoreFoundation (6.9 - 855.17) <729BD6DA-1F63-3E72-A148-26F21EBF52BB> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation


External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 1
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 351923
    thread_create: 1
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=206.1M resident=162.3M(79%) swapped_out_or_unallocated=43.8M(21%)
Writable regions: Total=266.7M written=167.8M(63%) resident=171.9M(64%) swapped_out=0K(0%) unallocated=94.8M(36%)
 
REGION TYPE                      VIRTUAL
===========                      =======
CG shared images                    140K
Dispatch continuations             16.0M
Kernel Alloc Once                     4K
MALLOC                            225.9M
MALLOC (admin)                       32K
STACK GUARD                        56.1M
Stack                              15.2M
VM_ALLOCATE                        1992K
__DATA                             29.6M
__IMAGE                             528K
__LINKEDIT                         74.0M
__TEXT                            132.1M
__UNICODE                           544K
mapped file                        25.2M
shared memory                         4K
===========                      =======
TOTAL                             577.2M

Model: MacBookPro8,3, BootROM MBP81.0047.B27, 4 processors, Intel Core i7, 2.4 GHz, 16 GB, SMC 1.70f6
Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 512 MB
Graphics: AMD Radeon HD 6770M, AMD Radeon HD 6770M, PCIe, 1024 MB
Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1333 MHz, 0x802C, 0x31364B544631473634485A2D314734443120
Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1333 MHz, 0x802C, 0x31364B544631473634485A2D314734443120
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 (5.106.98.100.22)
Bluetooth: Version 5.2.7f4 15858, 3 services, 23 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
PCI Card: pci1b21,612, AHCI Controller, Thunderbolt@186,0,0
PCI Card: pci1b73,1100, USB eXtensible Host Controller, Thunderbolt@191,0,0
PCI Card: ethernet, Ethernet Controller, Thunderbolt@190,0,0
PCI Card: pci1b21,1142, USB eXtensible Host Controller, Thunderbolt@195,0,0
Serial ATA Device: ST1000LM014-1EJ164, 1 TB
Serial ATA Device: HL-DT-ST DVDRW  GS23NR
Serial ATA Device: APPLE HDD HTS541075A9E662, 750.16 GB
USB Device: FaceTime HD Camera (Built-in)
USB Device: Hub
USB Device: Kinesis Keyboard Hub
USB Device: Composite Device
USB Device: BRCM2070 Hub
USB Device: Bluetooth USB Host Controller
USB Device: Apple Internal Keyboard / Trackpad
USB Device: Hub
USB Device: External
USB Device: Hub
USB Device: Music Streamer II+
USB Device: IR Receiver
USB Device: USB audio CODEC
USB Device: HD Pro Webcam C920
USB Device: Wacom Cintiq Hybrid 13HD Hub
USB Device: CP2102 USB to UART Bridge Controller
USB Device: Cintiq Hybrid 13HD
USB Device: USB Camera
USB Device: Cintiq Hybrid 13HD Touch
USB Device: Cintiq Companion Hybrid 13HD
USB Device: ASM107x
USB Device: ASM107x
Thunderbolt Bus: MacBook Pro, Apple Inc., 25.1
Thunderbolt Device: GoFlex Desk Adapter Thunderbolt, Seagate, 1, 26.0

[Antoine.]

Antoine:  Try to disable auto import and see if it still crashes.  It sounds like MC *might* be hitting some bad files and crashing.

Tools > Options > Library & Folders > run auto import in background > (uncheck)

Brian.

Well, the software stopped crashing after having been started 3 or 4 times...  ?

[wouterk]

Have you tried:
- Launch the Mac in Recovery Mode
- run Disk Utility
    - Check the hard disk
    - Pre- El Capitan: repair disk parmissions?

For Recovery mode check:
http://www.tekrevue.com/tip/mac-startup-options/

Wouter

[glynor]

It tries to open tons of new MC windows (new icons keep appearing in the taskbar) right from the start, when nothing is playing.

Just FYI, this is normal behavior when MC is importing new files.

This may indicate that MC is crashing when it encounters disk corruption or a bad file in one of the watched directories. I concur with the suggestion above of checking your disk for errors. This is also covered in the Troubleshooting Guides on JRiver's Wiki:
http://wiki.jriver.com/index.php/Troubleshooting_Disks#Filesystem_Corruption

However, you might have better luck generally (not specifically for this issue) if you create a Library Backup in your old version of MC, and then restore it in MC21, rather than trying to import everything from scratch.  See this article for more detail:
http://wiki.jriver.com/index.php/Library_Backup