Frequent kernel panics -- can't figure it out...

Hi everyone,

I hope I'm posting this in the correct forum. I'm having a real problem with kernel panics on my Intel iMac. It's been going on ever since I bought my Intel iMac about 2 years ago, but it only happens when I use my music sequencing programs -- either Logic Pro 8 (or 7) or Digital Performer 5.11. In the past, I wasn't using the programs all that often, and so I just lived with the problem. But, I'm getting busier and busier in my composing studio, and therefore it's becoming a much bigger problem.

Today, I had 5 kernel panics which forced me to reboot my computer each time. A few minutes ago, I found a log on my computer called "panic.log", and so in an effort to understand what's going on with my computer, I'm hoping to get some feedback on the contents of today's log.

Here it is:

*******

Wed Jul 23 16:35:20 2008
panic(cpu 0 caller 0x003BF3D6): OSObject::refcount: Attempting to retain a freed object
Backtrace, Format - Frame : Return Address (4 potential args on stack)
0x254cbba8 : 0x128d0d (0x3cc65c 0x254cbbcc 0x131f95 0x0)
0x254cbbe8 : 0x3bf3d6 (0x3f2c48 0x3f2c24 0x20 0x938bef)
0x254cbc08 : 0x3bf4ff (0x4402400 0x0 0x254cbc28 0xa2e0b8)
0x254cbc28 : 0x8470f9 (0x4402400 0x4107500 0xa2e0b8 0x0)
0x254cbc98 : 0x844907 (0x4402400 0xa2e0b8 0x0 0x1)
0x254cbce8 : 0x845559 (0x4121600 0x0 0xa2e0b8 0x0)
0x254cbd18 : 0x3b38a2 (0x4344100 0x44ed1ac 0x48da594 0x1c)
0x254cbd68 : 0x18a82a (0x4344100 0x4 0x44ed1ac 0x1c)
0x254cbdb8 : 0x12b4ee (0x44ed184 0x48da56c 0x0 0x0)
0x254cbdf8 : 0x124b17 (0x44ed100 0x0 0x48 0x254cbedc)
0x254cbf08 : 0x195f2e (0x254cbf44 0x0 0x0 0x0)
0x254cbfc8 : 0x19b81e (0x445cb08 0x0 0x8 0x445cb08) No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xb0283908
Kernel loadable modules in backtrace (with dependencies):
com.motu.driver.USBMidiKext(1.3.4)@0x843000
dependency: com.apple.iokit.IOUSBFamily(2.7.7)@0x536000

Kernel version:
Darwin Kernel Version 8.11.1: Wed Oct 10 18:23:28 PDT 2007; root:xnu-792.25.20~1/RELEASE_I386


*******

Wed Jul 23 17:15:26 2008
panic(cpu 0 caller 0x001A49CB): Unresolved kernel trap (CPU 0, Type 14=page fault), registers:
CR0: 0x8001003b, CR2: 0x00000134, CR3: 0x00f38000, CR4: 0x000006e0
EAX: 0x0446b600, EBX: 0x00243e62, ECX: 0x0039a9be, EDX: 0x0430aa00
CR2: 0x00000134, EBP: 0x254bbc98, ESI: 0x0430ab34, EDI: 0x04558bb8
EFL: 0x00010246, EIP: 0x00000134, CS: 0x00000008, DS: 0x00000010

Backtrace, Format - Frame : Return Address (4 potential args on stack)
0x254bba88 : 0x128d0d (0x3cc65c 0x254bbaac 0x131f95 0x0)
0x254bbac8 : 0x1a49cb (0x3d2a94 0x0 0xe 0x3d22b8)
0x254bbbd8 : 0x19b3a4 (0x254bbbe4 0xe 0x48 0x3b10010)
0x254bbc98 : 0x844907 (0x430aa00 0x243e62 0x0 0x1)
0x254bbce8 : 0x845559 (0x40bf700 0x0 0x243e62 0x0)
0x254bbd18 : 0x3b38a2 (0x4401a00 0x4558bac 0x4226594 0x1c)
0x254bbd68 : 0x18a82a (0x4401a00 0x4 0x4558bac 0x1c)
0x254bbdb8 : 0x12b4ee (0x4558b84 0x422656c 0x0 0x0)
0x254bbdf8 : 0x124b17 (0x4558b00 0x0 0x48 0x254bbedc)
0x254bbf08 : 0x195f2e (0x254bbf44 0x0 0x0 0x0)
0x254bbfc8 : 0x19b81e (0x445ca40 0x0 0x19e0b5 0x44f4c64) No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xb0283908
Kernel loadable modules in backtrace (with dependencies):
com.motu.driver.USBMidiKext(1.3.4)@0x843000
dependency: com.apple.iokit.IOUSBFamily(2.7.7)@0x536000

Kernel version:
Darwin Kernel Version 8.11.1: Wed Oct 10 18:23:28 PDT 2007; root:xnu-792.25.20~1/RELEASE_I386


*******

Wed Jul 23 17:25:58 2008
panic(cpu 0 caller 0x001A49CB): Unresolved kernel trap (CPU 0, Type 14=page fault), registers:
CR0: 0x8001003b, CR2: 0xc3ab79b7, CR3: 0x00f38000, CR4: 0x000006e0
EAX: 0x03a79241, EBX: 0x00092cc5, ECX: 0x0039a9be, EDX: 0x04461000
CR2: 0xc3ab79b7, EBP: 0x254e3c98, ESI: 0x04461134, EDI: 0x04458ab8
EFL: 0x00010a86, EIP: 0x0414850b, CS: 0x00000008, DS: 0x00000010

Backtrace, Format - Frame : Return Address (4 potential args on stack)
0x254e3a88 : 0x128d0d (0x3cc65c 0x254e3aac 0x131f95 0x0)
0x254e3ac8 : 0x1a49cb (0x3d2a94 0x0 0xe 0x3d22b8)
0x254e3bd8 : 0x19b3a4 (0x254e3be4 0xe 0x48 0x3eb0010)
0x254e3c98 : 0x844907 (0x4461000 0x92cc5 0x0 0x1)
0x254e3ce8 : 0x845559 (0x40b9700 0x0 0x92cc5 0x0)
0x254e3d18 : 0x3b38a2 (0x4490100 0x4458aac 0x4231594 0x1c)
0x254e3d68 : 0x18a82a (0x4490100 0x4 0x4458aac 0x1c)
0x254e3db8 : 0x12b4ee (0x4458a84 0x423156c 0x0 0x0)
0x254e3df8 : 0x124b17 (0x4458a00 0x0 0x48 0x254e3edc)
0x254e3f08 : 0x195f2e (0x254e3f44 0x0 0x0 0x0)
0x254e3fc8 : 0x19b81e (0x4444aa4 0x0 0x19e0b5 0x3bfcbf8) No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xb0283908
Kernel loadable modules in backtrace (with dependencies):
com.motu.driver.USBMidiKext(1.3.4)@0x843000
dependency: com.apple.iokit.IOUSBFamily(2.7.7)@0x536000

Kernel version:
Darwin Kernel Version 8.11.1: Wed Oct 10 18:23:28 PDT 2007; root:xnu-792.25.20~1/RELEASE_I386


*******

Wed Jul 23 23:34:35 2008
panic(cpu 1 caller 0x001A49CB): Unresolved kernel trap (CPU 1, Type 14=page fault), registers:
CR0: 0x8001003b, CR2: 0x0002be5b, CR3: 0x00f38000, CR4: 0x000006e0
EAX: 0x04421c00, EBX: 0x0052eaf7, ECX: 0x0039a9be, EDX: 0x04476c00
CR2: 0x0002be5b, EBP: 0x2542bc98, ESI: 0x04476d14, EDI: 0x043662b8
EFL: 0x00010246, EIP: 0x0002be5b, CS: 0x00000008, DS: 0x00000010

Backtrace, Format - Frame : Return Address (4 potential args on stack)
0x2542ba88 : 0x128d0d (0x3cc65c 0x2542baac 0x131f95 0x0)
0x2542bac8 : 0x1a49cb (0x3d2a94 0x1 0xe 0x3d22b8)
0x2542bbd8 : 0x19b3a4 (0x2542bbe4 0xe 0x48 0x3ae0010)
0x2542bc98 : 0x844907 (0x4476c00 0x52eaf7 0x0 0x1)
0x2542bce8 : 0x845559 (0x3cf0600 0x0 0x52eaf7 0x0)
0x2542bd18 : 0x3b38a2 (0x43c9700 0x43662ac 0x5440594 0x1c)
0x2542bd68 : 0x18a82a (0x43c9700 0x4 0x43662ac 0x1c)
0x2542bdb8 : 0x12b4ee (0x4366284 0x544056c 0x0 0x0)
0x2542bdf8 : 0x124b17 (0x4366200 0x0 0x48 0x2542bedc)
0x2542bf08 : 0x195f2e (0x2542bf44 0x0 0x0 0x0)
0x2542bfc8 : 0x19b81e (0x446e914 0x0 0x19e0b5 0x44f4cec) No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xb0283908
Kernel loadable modules in backtrace (with dependencies):
com.motu.driver.USBMidiKext(1.3.4)@0x843000
dependency: com.apple.iokit.IOUSBFamily(2.7.7)@0x536000

Kernel version:
Darwin Kernel Version 8.11.1: Wed Oct 10 18:23:28 PDT 2007; root:xnu-792.25.20~1/RELEASE_I386


*******

Wed Jul 23 23:46:06 2008
panic(cpu 1 caller 0x001A49CB): Unresolved kernel trap (CPU 1, Type 14=page fault), registers:
CR0: 0x8001003b, CR2: 0x0550f834, CR3: 0x00f38000, CR4: 0x000006e0
EAX: 0x0450f201, EBX: 0x0009d348, ECX: 0x0039a9be, EDX: 0x0450f600
CR2: 0x0550f834, EBP: 0x25483c98, ESI: 0x0450f734, EDI: 0x04b44eb8
EFL: 0x00010202, EIP: 0x03ff8101, CS: 0x00000008, DS: 0x00000010

Backtrace, Format - Frame : Return Address (4 potential args on stack)
0x25483a88 : 0x128d0d (0x3cc65c 0x25483aac 0x131f95 0x0)
0x25483ac8 : 0x1a49cb (0x3d2a94 0x1 0xe 0x3d22b8)
0x25483bd8 : 0x19b3a4 (0x25483be4 0xe 0x48 0x3ec0010)
0x25483c98 : 0x844907 (0x450f600 0x9d348 0x0 0x1)
0x25483ce8 : 0x845559 (0x40d8500 0x0 0x9d348 0x0)
0x25483d18 : 0x3b38a2 (0x43b0b00 0x4b44eac 0x454b594 0x1c)
0x25483d68 : 0x18a82a (0x43b0b00 0x4 0x4b44eac 0x1c)
0x25483db8 : 0x12b4ee (0x4b44e84 0x454b56c 0x0 0x0)
0x25483df8 : 0x124b17 (0x4b44e00 0x0 0x48 0x25483edc)
0x25483f08 : 0x195f2e (0x25483f44 0x0 0x0 0x0)
0x25483fc8 : 0x19b81e (0x4481978 0x0 0x19e0b5 0x448152c) No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xb0283908
Kernel loadable modules in backtrace (with dependencies):
com.motu.driver.USBMidiKext(1.3.4)@0x843000
dependency: com.apple.iokit.IOUSBFamily(2.7.7)@0x536000

Kernel version:
Darwin Kernel Version 8.11.1: Wed Oct 10 18:23:28 PDT 2007; root:xnu-792.25.20~1/RELEASE_I386


*******



None of this makes sense to me, although I do recognize the reference to the MOTU driver at the end of each entry. I've suspected for a long time that it may have something to do with either a MIDI driver or my audio I/O, since these kernel panics happen only when I'm using my sequencing programs, and never while using any other program.

So, does this confirm my suspicion? Or is each entry telling me something else? I hope the above information makes sense to someone here who can then interpret it to me! 🙂

Thanks!
Kevin