Segmentation violation Error in my MEX file

mex unravel.c
IM=imread('F:\TEST\test.tiff'); 
IM=imresize(IM,[1024 1024]);
TG=im2jpeg(IM,50);
TG=jpeg2im(TG);

after running this code i got an error

Abnormal termination:
Segmentation violation
%few lines in between this %
Caught MathWorks::System::FatalException
[Please exit and restart MATLAB]>>

[Walter Roberson]

Your traceback shows a problem in the (unknown code for) unravel, but the MATLAB code you show has no obvious call to "unravel". Where is "unravel" being called?

[Walter Roberson]

The forum indicates that you have edited your Question, but it looks pretty much the same to me ? I don't see what you have changed?

Answer 1

[PRAKASH BHARTI]

Full description of error which i got.

------------------------------------------------------------------------
       Segmentation violation detected at Sat Sep 29 10:40:08 2012
------------------------------------------------------------------------

Configuration:
  Crash Decoding  : Disabled
  Default Encoding: windows-1252
  MATLAB License  : XXXXXXXX
  MATLAB Root     : C:\Program Files\MATLAB\R2011a
  MATLAB Version  : 7.12.0.635 (R2011a)
  Operating System: Microsoft Windows 7
  Processor ID    : x86 Family 6 Model 10 Stepping 7, GenuineIntel
  Virtual Machine : Java 1.6.0_17-b04 with Sun Microsystems Inc. Java HotSpot(TM) 64-Bit Server VM mixed mode
  Window System   : Version 6.1 (Build 7601: Service Pack 1)

Fault Count: 1

Abnormal termination:
Segmentation violation

Register State (from fault):
  RAX = 000000003d931200  RBX = 0000000000000000
  RCX = 0000000000000001  RDX = 0000000001719880
  RSP = 0000000001718d60  RBP = 0000000001719760
  RSI = 000000003d936db0  RDI = 0000000001719760

     R8 = 0000000000000003   R9 = 0000000001719760
    R10 = 0000000000000003  R11 = 0000000001719880
    R12 = 0000000001719880  R13 = 0000000035d5ec20
    R14 = 0000000000000003  R15 = 000000006b67fd40

    RIP = 0000000075a25e76  EFL = 00010206

     CS = 0033   FS = 0053   GS = 002b

Stack Trace (from fault):
[  0] 0x0000000075a25e76 C:/Program Files/MATLAB/R2011a/bin/win64/libmx.dll+00024182 ( mxGetM+000006 )
[  1] 0x000007fef61711ee                             F:/TEST/unravel.mexw64+00004590 ( mexFunction+000110 )
[  2] 0x0000000072933333 C:/Program Files/MATLAB/R2011a/bin/win64/libmex.dll+00013107 ( mexRunMexFile+000131 )
[  3] 0x000000007293205f C:/Program Files/MATLAB/R2011a/bin/win64/libmex.dll+00008287 ( inSwapMexfileReader+000223 )
[  4] 0x0000000072932228 C:/Program Files/MATLAB/R2011a/bin/win64/libmex.dll+00008744 ( inSwapMexfileReader+000680 )
[  5] 0x000000006b62f859 C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00063577 ( Mfh_file::dispatch_fh+000473 )
[  6] 0x000000006b62fccf C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00064719 ( Mfunction_handle::dispatch+000767 )
[  7] 0x000000006a5c4f34 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00675636 ( inDestroyWS+409812 )
[  8] 0x000000006a5b25e8 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00599528 ( inDestroyWS+333704 )
[  9] 0x000000006a58a0aa C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00434346 ( inDestroyWS+168522 )
[ 10] 0x000000006a59812b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00491819 ( inDestroyWS+225995 )
[ 11] 0x000000006a59ab49 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00502601 ( inDestroyWS+236777 )
[ 12] 0x000000006a59de65 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00515685 ( inDestroyWS+249861 )
[ 13] 0x000000006a5b4c73 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609395 ( inDestroyWS+343571 )
[ 14] 0x000000006a5b4dc0 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609728 ( inDestroyWS+343904 )
[ 15] 0x000000006a5a624b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00549451 ( inDestroyWS+283627 )
[ 16] 0x000000006a5a42ac C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00541356 ( inDestroyWS+275532 )
[ 17] 0x000000006a5b1009 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00593929 ( inDestroyWS+328105 )
[ 18] 0x000000006b62f859 C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00063577 ( Mfh_file::dispatch_fh+000473 )
[ 19] 0x000000006b62fccf C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00064719 ( Mfunction_handle::dispatch+000767 )
[ 20] 0x000000006a5a182b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00530475 ( inDestroyWS+264651 )
[ 21] 0x000000006a59e082 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00516226 ( inDestroyWS+250402 )
[ 22] 0x000000006a5b4c73 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609395 ( inDestroyWS+343571 )
[ 23] 0x000000006a5b4dc0 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609728 ( inDestroyWS+343904 )
[ 24] 0x000000006a5a624b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00549451 ( inDestroyWS+283627 )
[ 25] 0x000000006a5a42ac C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00541356 ( inDestroyWS+275532 )
[ 26] 0x000000006a5b1009 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00593929 ( inDestroyWS+328105 )
[ 27] 0x000000006b62f859 C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00063577 ( Mfh_file::dispatch_fh+000473 )
[ 28] 0x000000006b62fccf C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00064719 ( Mfunction_handle::dispatch+000767 )
[ 29] 0x000000006a5a182b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00530475 ( inDestroyWS+264651 )
[ 30] 0x000000006a60d99c C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00973212 ( inIsDefinedVariable+019900 )
[ 31] 0x000000006a59f8db C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00522459 ( inDestroyWS+256635 )
[ 32] 0x000000006a5b4c73 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609395 ( inDestroyWS+343571 )
[ 33] 0x000000006a5b4dc0 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609728 ( inDestroyWS+343904 )
[ 34] 0x000000006a5a624b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00549451 ( inDestroyWS+283627 )
[ 35] 0x000000006a5a42ac C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00541356 ( inDestroyWS+275532 )
[ 36] 0x000000006a5b1009 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00593929 ( inDestroyWS+328105 )
[ 37] 0x000000006b62f859 C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00063577 ( Mfh_file::dispatch_fh+000473 )
[ 38] 0x000000006b62fccf C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00064719 ( Mfunction_handle::dispatch+000767 )
[ 39] 0x000000006a626de8 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01076712 ( inSetPredictor+001000 )
[ 40] 0x000000006a633415 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01127445 ( inInitInterestRegistry+004309 )
[ 41] 0x000000006a635175 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01134965 ( inIsCodeBlockComplete+007445 )
[ 42] 0x000000006a635148 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01134920 ( inIsCodeBlockComplete+007400 )
[ 43] 0x000000006a63510e C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01134862 ( inIsCodeBlockComplete+007342 )
[ 44] 0x000000006a5f8113 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00885011 ( inGetSeqVarPtrsFromCurrentWS+007315 )
[ 45] 0x000000006a6298e0 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01087712 ( inEvalCmdWithLocalReturn+000304 )
[ 46] 0x000000006a62983c C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01087548 ( inEvalCmdWithLocalReturn+000140 )
[ 47] 0x000000006a6297f1 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01087473 ( inEvalCmdWithLocalReturn+000065 )
[ 48] 0x0000000079fb833a C:/Program Files/MATLAB/R2011a/bin/win64/libmwbridge.dll+00033594 ( mnDebugPrompt+000106 )
[ 49] 0x0000000079fbd0d2 C:/Program Files/MATLAB/R2011a/bin/win64/libmwbridge.dll+00053458 ( mnParser+000418 )
[ 50] 0x00000000749ab604   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00243204 ( mcrInstance::mnParser_on_interpreter_thread+000036 )
[ 51] 0x000000007498ed24   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00126244 ( DepfunRules::postWarning+045636 )
[ 52] 0x000000007498edb1   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00126385 ( DepfunRules::postWarning+045777 )
[ 53] 0x0000000001b89676   C:/Program Files/MATLAB/R2011a/bin/win64/uiw.dll+00366198 ( UIW_IsUserMessage+000086 )
[ 54] 0x0000000001b89d44   C:/Program Files/MATLAB/R2011a/bin/win64/uiw.dll+00367940 ( ws_ProcessPendingEventsWaitForWindows+000356 )
[ 55] 0x00000000774d87fe                     C:/Windows/system32/USER32.dll+00165886 ( GetMenuBarInfo+000638 )
[ 56] 0x00000000774bf5fb                     C:/Windows/system32/USER32.dll+00062971 ( SystemParametersInfoW+000235 )
[ 57] 0x00000000774c4895                     C:/Windows/system32/USER32.dll+00084117 ( IsProcessDPIAware+000465 )
[ 58] 0x0000000077961225                      C:/Windows/SYSTEM32/ntdll.dll+00332325 ( KiUserCallbackDispatcher+000031 )
[ 59] 0x00000000774c9e6a                     C:/Windows/system32/USER32.dll+00106090 ( SfmDxSetSwapChainStats+000026 )
[ 60] 0x00000000774c615e                     C:/Windows/system32/USER32.dll+00090462 ( GetMessageA+000078 )
[ 61] 0x0000000001b63f07   C:/Program Files/MATLAB/R2011a/bin/win64/uiw.dll+00212743 ( UIW_SetCurrentDialog+000855 )
[ 62] 0x0000000001b8b117   C:/Program Files/MATLAB/R2011a/bin/win64/uiw.dll+00373015 ( ws_FreeSystemFont+000519 )
[ 63] 0x000000006999b7b3 C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00178099 ( sysq::ws_ppeHook::~ws_ppeHook+009539 )
[ 64] 0x000000006999cf3c C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00184124 ( svWS_CommitDatabaseUpdates+002796 )
[ 65] 0x000000006999d97a C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00186746 ( svWS_CommitDatabaseUpdates+005418 )
[ 66] 0x000000006999dbbd C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00187325 ( svWS_CommitDatabaseUpdates+005997 )
[ 67] 0x000000006999ddb8 C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00187832 ( svWS_CommitDatabaseUpdates+006504 )
[ 68] 0x000000006999df10 C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00188176 ( svWS_CommitDatabaseUpdates+006848 )
[ 69] 0x000000007498e28f   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00123535 ( DepfunRules::postWarning+042927 )
[ 70] 0x000000007498f051   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00127057 ( DepfunRules::postWarning+046449 )
[ 71] 0x000000007498f37e   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00127870 ( DepfunRules::postWarning+047262 )
[ 72] 0x000000013f417304 C:/Program Files/MATLAB/R2011a/bin/win64/MATLAB.exe+00029444 ( ???+000000 )
[ 73] 0x000000013f4173d9 C:/Program Files/MATLAB/R2011a/bin/win64/MATLAB.exe+00029657 ( ???+000000 )
[ 74] 0x000000013f4178cb C:/Program Files/MATLAB/R2011a/bin/win64/MATLAB.exe+00030923 ( ???+000000 )
[ 75] 0x00000000773a652d                   C:/Windows/system32/kernel32.dll+00091437 ( BaseThreadInitThunk+000013 )
[ 76] 0x000000007793c521                      C:/Windows/SYSTEM32/ntdll.dll+00181537 ( RtlUserThreadStart+000033 )

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\PRAKASH\AppData\Local\Temp\matlab_crash_dump.5208-1 **

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