URGENT... Matlab System::Fa​talExcepti​on!!!

Hi all,, I have SERIOUS problem with my Matlab. I m going to do classification by using SIFT featrues (vl_sift function from VLFEAT and LIBSVM library).

I have 2000 Images for training. But everytime I tried to extract the SIFT features from that 2000 images, I always get errors and matlab will force to be closed (Exit)..

And the wierd things is that, when I extract the SIFT features for 200 images, I didnt get any errors.

Then I tried to extract only for 500 images, but I still get that errors..

I had setup the mex by using

Would you like mex to locate installed compilers [y]/n? y
Select a compiler: 
[1] Lcc-win32 C 2.4.1 in C:\PROGRA~1\MATLAB\R2013a\sys\lcc 
[2] Microsoft Visual C++ 2008 SP1 in C:\Program Files\Microsoft Visual Studio 9.0 

   [0] None 

   Compiler: 2

Before this problems appear, I was able to do feat extraction for 2000 images..

Here is the error mssgs:

    ------------------------------------------------------------------------
         Segmentation violation detected at Mon May 19 15:55:25 2014
  ------------------------------------------------------------------------

Configuration:
  Crash Decoding     : Disabled
  Default Encoding   : windows-1252
  MATLAB Architecture: win32
  MATLAB Root        : C:\Program Files\MATLAB\R2013a
  MATLAB Version     : 8.1.0.604 (R2013a)
  Operating System   : Microsoft Windows 7
  Processor ID       : x86 Family 6 Model 37 Stepping 5, GenuineIntel
  Virtual Machine    : Java 1.6.0_17-b04 with Sun Microsystems Inc. Java HotSpot(TM) Client VM mixed mode
  Window System      : Version 6.1 (Build 7601: Service Pack 1)

Fault Count: 1

Abnormal termination:
Segmentation violation

Register State (from fault):
  EAX = 00c2b3b0  EBX = 2816bbe0
  ECX = 0000000c  EDX = 024c06b0
  ESP = 00c2b32c  EBP = 00c2b484
  ESI = 00000000  EDI = 00c2b3b0

    EIP = 06525d31  EFL = 00210212

     CS = 0000001b   DS = 00000023   SS = 00000023
     ES = 00000023   FS = 0000003b   GS = 00000000

Stack Trace (from fault):
[  0] 0x06525d31 E:\Master_Thesis_UB_TSR\vlfeat-0.9.18-bin_TSR\vlfeat-0.9.18\toolbox\mex\mexw32\vl.dll+00154929 vl_scalespace_get_geometry+00000017
[  1] 0x064e2279 E:\Master_Thesis_UB_TSR\vlfeat-0.9.18-bin_TSR\vlfeat-0.9.18\toolbox\mex\mexw32\vl_covdet.mexw32+00008825 mexFunction+00002521
[  2] 0x73dcdd4e C:\Program Files\MATLAB\R2013a\bin\win32\libmex.dll+00056654 mexRunMexFile+00000126
[  3] 0x73dcc489 C:\Program Files\MATLAB\R2013a\bin\win32\libmex.dll+00050313 inSwapMexfileReader+00000201
[  4] 0x73dcd5cd C:\Program Files\MATLAB\R2013a\bin\win32\libmex.dll+00054733 _constructor_lm_mexmaci64+00001885
[  5] 0x7f63c939 C:\Program Files\MATLAB\R2013a\bin\win32\m_dispatcher.dll+00051513 Mfh_file::dispatch_fh+00000505
[  6] 0x7f63d139 C:\Program Files\MATLAB\R2013a\bin\win32\m_dispatcher.dll+00053561 Mfunction_handle::dispatch+00000745
[  7] 0x7b995884 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00481412 inDestroyWS+00203364
[  8] 0x7b997ae7 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00490215 inDestroyWS+00212167
[  9] 0x7b9a9ce7 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00564455 inDestroyWS+00286407
[ 10] 0x7b9a9e02 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00564738 inDestroyWS+00286690
[ 11] 0x7b98ee57 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00454231 inDestroyWS+00176183
[ 12] 0x7b9944e8 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00476392 inDestroyWS+00198344
[ 13] 0x7b9a7abe C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00555710 inDestroyWS+00277662
[ 14] 0x7f63c939 C:\Program Files\MATLAB\R2013a\bin\win32\m_dispatcher.dll+00051513 Mfh_file::dispatch_fh+00000505
[ 15] 0x7f63d139 C:\Program Files\MATLAB\R2013a\bin\win32\m_dispatcher.dll+00053561 Mfunction_handle::dispatch+00000745
[ 16] 0x7b9b5a57 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00612951 inDestroyWS+00334903
[ 17] 0x7b9a643d C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00549949 inDestroyWS+00271901
[ 18] 0x7b991192 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00463250 inDestroyWS+00185202
[ 19] 0x7bca5283 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+03691139 inCallFcnWithTrapInDesiredWS+00003719
[ 20] 0x7b9a2f89 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00536457 inDestroyWS+00258409
[ 21] 0x7b99a350 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00500560 inDestroyWS+00222512
[ 22] 0x7b98edbf C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00454079 inDestroyWS+00176031
[ 23] 0x7b9944e8 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00476392 inDestroyWS+00198344
[ 24] 0x7b9a7abe C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00555710 inDestroyWS+00277662
[ 25] 0x7f63c939 C:\Program Files\MATLAB\R2013a\bin\win32\m_dispatcher.dll+00051513 Mfh_file::dispatch_fh+00000505
[ 26] 0x7f63d139 C:\Program Files\MATLAB\R2013a\bin\win32\m_dispatcher.dll+00053561 Mfunction_handle::dispatch+00000745
[ 27] 0x7b9ff80c C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00915468 inMainLoopIdle+00002572
[ 28] 0x7ba06b0f C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00944911 inInitializeParser+00005887
[ 29] 0x7ba0aa79 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00961145 MathWorks::MException::MExceptionEnvelope::Copy+00006953
[ 30] 0x7ba0aa55 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00961109 MathWorks::MException::MExceptionEnvelope::Copy+00006917
[ 31] 0x7ba0aa10 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00961040 MathWorks::MException::MExceptionEnvelope::Copy+00006848
[ 32] 0x7b9367ae C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00092078 inClearArraysInDesiredWS+00001854
[ 33] 0x7ba02c10 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00928784 inEvalCmdWithLocalReturn+00000224
[ 34] 0x7ba02bb9 C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00928697 inEvalCmdWithLocalReturn+00000137
[ 35] 0x7ba02b4e C:\Program Files\MATLAB\R2013a\bin\win32\m_interpreter.dll+00928590 inEvalCmdWithLocalReturn+00000030
[ 36] 0x7e1cba83 C:\Program Files\MATLAB\R2013a\bin\win32\libmwbridge.dll+00047747 mnDebugPrompt+00000163
[ 37] 0x7e1cc9ff C:\Program Files\MATLAB\R2013a\bin\win32\libmwbridge.dll+00051711 mnParser+00000799
[ 38] 0x7f29b273   C:\Program Files\MATLAB\R2013a\bin\win32\mcr.dll+00176755 mcrInstance::mnParser_on_interpreter_thread+00000051
[ 39] 0x7f28112a   C:\Program Files\MATLAB\R2013a\bin\win32\mcr.dll+00069930 mcr::setInterpreterThreadToCurrent+00029274
[ 40] 0x7f2811e6   C:\Program Files\MATLAB\R2013a\bin\win32\mcr.dll+00070118 mcr::setInterpreterThreadToCurrent+00029462
[ 41] 0x03c62da9   C:\Program Files\MATLAB\R2013a\bin\win32\uiw.dll+00339369 UIW_IsUserMessage+00000121
[ 42] 0x03c63358   C:\Program Files\MATLAB\R2013a\bin\win32\uiw.dll+00340824 UIW_SetGLIMUserMsg+00000104
[ 43] 0x755a6d80                     C:\Windows\system32\USER32.dll+00224640 SetWindowsHookExA+00000116
[ 44] 0x7557e1a9                     C:\Windows\system32\USER32.dll+00057769 SystemParametersInfoW+00000271
[ 45] 0x7558248f                     C:\Windows\system32\USER32.dll+00074895 PtInRect+00000253
[ 46] 0x77a8702e                      C:\Windows\SYSTEM32\ntdll.dll+00290862 KiUserCallbackDispatcher+00000046
[ 47] 0x75582b1b                     C:\Windows\system32\USER32.dll+00076571 GetAncestor+00000126
[ 48] 0x03c4238d   C:\Program Files\MATLAB\R2013a\bin\win32\uiw.dll+00205709 UIW_SetCurrentDialog+00000637
[ 49] 0x03c64504   C:\Program Files\MATLAB\R2013a\bin\win32\uiw.dll+00345348 ws_FreeSystemFont+00000452
[ 50] 0x023b3254 C:\Program Files\MATLAB\R2013a\bin\win32\libmwservices.dll+00864852 services::system_events::PpeDispatchHook::~PpeDispatchHook+00055668
[ 51] 0x023b3a6a C:\Program Files\MATLAB\R2013a\bin\win32\libmwservices.dll+00866922 services::system_events::PpeDispatchHook::~PpeDispatchHook+00057738
[ 52] 0x023b23ff C:\Program Files\MATLAB\R2013a\bin\win32\libmwservices.dll+00861183 services::system_events::PpeDispatchHook::~PpeDispatchHook+00051999
[ 53] 0x023b4724 C:\Program Files\MATLAB\R2013a\bin\win32\libmwservices.dll+00870180 services::system_events::PpeDispatchHook::~PpeDispatchHook+00060996
[ 54] 0x023bcb01 C:\Program Files\MATLAB\R2013a\bin\win32\libmwservices.dll+00903937 svWS_ProcessPendingEvents+00000897
[ 55] 0x023bcc92 C:\Program Files\MATLAB\R2013a\bin\win32\libmwservices.dll+00904338 svWS_ProcessPendingEvents+00000018
[ 56] 0x7f282053   C:\Program Files\MATLAB\R2013a\bin\win32\mcr.dll+00073811 mcr::setInterpreterThreadToCurrent+00033155
[ 57] 0x7f28230c   C:\Program Files\MATLAB\R2013a\bin\win32\mcr.dll+00074508 mcr::setInterpreterThreadToCurrent+00033852
[ 58] 0x7f27655f   C:\Program Files\MATLAB\R2013a\bin\win32\mcr.dll+00025951 mcrInstantiationError::operator=+00003647
[ 59] 0x7f2795fc   C:\Program Files\MATLAB\R2013a\bin\win32\mcr.dll+00038396 mcr_invoke_on_interpreter_thread+00001772
[ 60] 0x004051a5 C:\Program Files\MATLAB\R2013a\bin\win32\MATLAB.exe+00020901
[ 61] 0x004057ee C:\Program Files\MATLAB\R2013a\bin\win32\MATLAB.exe+00022510
[ 62] 0x00405c1d C:\Program Files\MATLAB\R2013a\bin\win32\MATLAB.exe+00023581
[ 63] 0x766ded5c                   C:\Windows\system32\kernel32.dll+00322908 BaseThreadInitThunk+00000018
[ 64] 0x77aa37eb                      C:\Windows\SYSTEM32\ntdll.dll+00407531 RtlInitializeExceptionChain+00000239
[ 65] 0x77aa37be                      C:\Windows\SYSTEM32\ntdll.dll+00407486 RtlInitializeExceptionChain+00000194

This error was detected while a MEX-file was running. If the MEX-file
is not an official MathWorks function, please examine its source code
for errors. Please consult the External Interfaces Guide for information
on debugging MEX-files.

If this problem is reproducible, please submit a Service Request via:
    http://www.mathworks.com/support/contact_us/

A technical support engineer might contact you with further information.

Thank you for your help.** This crash report has been saved to disk as C:\Users\Farhana\AppData\Local\Temp\matlab_crash_dump.8180-1 **

Caught MathWorks::System::FatalException
[Please exit and restart MATLAB]>>

PLEASE HELP ME,,, ANY IDEA WHAT'S HAPPENING AND HOW TO SOLVE IT??

BTW, I have 3 partition in my windows 7 32 bits, with the free memory size

    *C: 57.1 gb    
     D: 12.6 gb
     E: 32.3 gb

     My Matlab is 2013a
     and Im  using Microsoft Visual C++ 2008*

Answer 1

[Malcolm Lidierth]

MATLAB uses lazy memory allocation. That means that if your code accesses a memory area that it should not (e.g. by incrementing a pointer beyond an allocated array) you may or may not see a segmentation fault (and you will not always see it immediately). If you run your code on 200 images 1000 times in a loop - do you see the error after a variable number of iterations? If so, this may be the explanation.