A problem in running a MEX file in a consistent way

I have written a MEX file. This file compiles successfully with no problem. For some reasons, which I am really baffled, this MEX file does not work properly any more. Nothing has changed. I am using the same MEX code and the same arguments for executing the MEX file. But it fails. I uninstalled and reinstalled MATLAB but it did not help.

I tracked the problem and it seems when it reaches mexCallMATLAB, it causes a crash.

    mxArray *x_locations = ( cellCentered ) ? mxCreateDoubleMatrix( 1, NZ-1, mxREAL ) : mxCreateDoubleMatrix( 1, NZ, mxREAL );
    mxArray *y_locations = ( cellCentered ) ? mxCreateDoubleMatrix( 1, NY-1, mxREAL ) : mxCreateDoubleMatrix( 1, NY, mxREAL );
    mxArray *z_locations = ( cellCentered ) ? mxCreateDoubleMatrix( 1, NX-1, mxREAL ) : mxCreateDoubleMatrix( 1, NX, mxREAL );

    // A loop for filling the values for x_locations, y_locations, z_locations 
    // ...
    // End of the loop

    // Create a meshgrid based on the values stored in x_locations, y_locations, z_locations 
    mxArray *IN[3];
    mxArray *OUT[3];
    IN[0] = x_locations;
    IN[1] = y_locations;
    IN[2] = z_locations;
    mexPrintf("Line Before mexCallMATLAB\n");
    mexCallMATLAB(3, OUT, 3, IN, "meshgrid");
    mexPrintf("Line After mexCallMATLAB\n");

When I run the MEX file, only Line Before mexCallMATLAB is printed and the code does not reach to print Line After mexCallMATLAB. Here is the log.

    MATLAB crash file:C:\Users\A\AppData\Local\Temp\matlab_crash_dump.7712-1:

    ------------------------------------------------------------------------
           Segmentation violation detected at Wed Jun 25 15:51:21 2014
    ------------------------------------------------------------------------

    Configuration:
      Crash Decoding  : Disabled
      Default Encoding: windows-1252
      MATLAB Root     : C:\Program Files\MATLAB\R2012b
      MATLAB Version  : 8.0.0.783 (R2012b)
      Operating System: Microsoft Windows 7
      Processor ID    : x86 Family 6 Model 26 Stepping 5, 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 = 0000000060de7cc0  RBX = 000009a28967bdb0
      RCX = 000000ffffffffff  RDX = 0000000060ea08e0
      RSP = 0000000004106360  RBP = 0000000000000000
      RSI = 0000000006fa0000  RDI = 0000000060ea08f0

       R8 = 0000000060ea08f0   R9 = 32525c4501cd000a
      R10 = 00000000166f3660  R11 = 00000000740faf60
      R12 = 0000000004106610  R13 = 00000000041064e0
      R14 = 00000000002dc6c0  R15 = 0000000000000000

      RIP = 0000000076d33290  EFL = 00010202

       CS = 0033   FS = 0053   GS = 002b

    Stack Trace (from fault):
    [  0] 0x0000000076d33290                      C:\Windows\SYSTEM32\ntdll.dll+00340624 ( RtlFreeHeap+000208 )
    [  1] 0x0000000076be1a4a                   C:\Windows\system32\kernel32.dll+00137802 ( HeapFree+000010 )
    [  2] 0x00000000725acabc C:\Windows\WinSxS\amd64_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.6161_none_08e61857a83bc251\MSVCR90.dll+00314044 ( free+000028 )
    [  3] 0x0000000075a23075 C:\Program Files\MATLAB\R2012b\bin\win64\libmx.dll+00012405 ( mxFree+000037 )
    [  4] 0x0000000075a84b9d C:\Program Files\MATLAB\R2012b\bin\win64\libmx.dll+00412573 ( mxSubscriptedReference+000621 )
    [  5] 0x000007fee4475709 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00087817 ( inIs_ws_variable+000329 )
    [  6] 0x000007fee44c8cce C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00429262 ( inFunctionHandleInterface::DestroyWorkspace+241806 )
    [  7] 0x000007fee44d2978 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00469368 ( inFunctionHandleInterface::DestroyWorkspace+281912 )
    [  8] 0x000007fee44d5a8b C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00481931 ( inFunctionHandleInterface::DestroyWorkspace+294475 )
    [  9] 0x000007fee44bde1f C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00384543 ( inFunctionHandleInterface::DestroyWorkspace+197087 )
    [ 10] 0x000007fee44bdd80 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00384384 ( inFunctionHandleInterface::DestroyWorkspace+196928 )
    [ 11] 0x000007fee44e197d C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00530813 ( inFunctionHandleInterface::DestroyWorkspace+343357 )
    [ 12] 0x000007fee44e0271 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00524913 ( inFunctionHandleInterface::DestroyWorkspace+337457 )
    [ 13] 0x000007fee44c20e9 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00401641 ( inFunctionHandleInterface::DestroyWorkspace+214185 )
    [ 14] 0x0000000074e8c80d C:\Program Files\MATLAB\R2012b\bin\win64\m_dispatcher.dll+00051213 ( Mfh_file::dispatch_fh+000509 )
    [ 15] 0x0000000074e8d0d6 C:\Program Files\MATLAB\R2012b\bin\win64\m_dispatcher.dll+00053462 ( Mfunction_handle::dispatch+000854 )
    [ 16] 0x000007fee4482cd8 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00142552 ( MathWorks::MException::MExceptionEnvelope::MExceptionEnvelope+003336 )
    [ 17] 0x000007fee453beb2 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00900786 ( inMexCallMATLAB+000738 )
    [ 18] 0x000007fee453bb9e C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00899998 ( IInterpreter::GetInterpreterBridge+148286 )
    [ 19] 0x000007fee453bcaf C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00900271 ( inMexCallMATLAB+000223 )
    [ 20] 0x0000000061ce6989 C:\Program Files\MATLAB\R2012b\bin\win64\libmex.dll+00027017 ( mexCallMATLAB+000073 )
    [ 21] 0x0000000009b02272 D:\Files\mymexfile.mexw64+00008818 ( mexFunction+004722 )
    [ 22] 0x0000000061cf0f83 C:\Program Files\MATLAB\R2012b\bin\win64\libmex.dll+00069507 ( mexRunMexFile+000131 )
    [ 23] 0x0000000061cefce2 C:\Program Files\MATLAB\R2012b\bin\win64\libmex.dll+00064738 ( inSwapMexfileReader+000226 )
    [ 24] 0x0000000061cefe64 C:\Program Files\MATLAB\R2012b\bin\win64\libmex.dll+00065124 ( inSwapMexfileReader+000612 )
    [ 25] 0x0000000074e8c80d C:\Program Files\MATLAB\R2012b\bin\win64\m_dispatcher.dll+00051213 ( Mfh_file::dispatch_fh+000509 )
    [ 26] 0x0000000074e8d0d6 C:\Program Files\MATLAB\R2012b\bin\win64\m_dispatcher.dll+00053462 ( Mfunction_handle::dispatch+000854 )
    [ 27] 0x000007fee44b210b C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00336139 ( inFunctionHandleInterface::DestroyWorkspace+148683 )
    [ 28] 0x000007fee44c3edf C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00409311 ( inFunctionHandleInterface::DestroyWorkspace+221855 )
    [ 29] 0x000007fee44e0ae8 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00527080 ( inFunctionHandleInterface::DestroyWorkspace+339624 )
    [ 30] 0x000007fee44c8d94 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00429460 ( inFunctionHandleInterface::DestroyWorkspace+242004 )
    [ 31] 0x000007fee44d2978 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00469368 ( inFunctionHandleInterface::DestroyWorkspace+281912 )
    [ 32] 0x000007fee44e18c1 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00530625 ( inFunctionHandleInterface::DestroyWorkspace+343169 )
    [ 33] 0x000007fee44e0271 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00524913 ( inFunctionHandleInterface::DestroyWorkspace+337457 )
    [ 34] 0x000007fee44c20e9 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00401641 ( inFunctionHandleInterface::DestroyWorkspace+214185 )
    [ 35] 0x0000000074e8c80d C:\Program Files\MATLAB\R2012b\bin\win64\m_dispatcher.dll+00051213 ( Mfh_file::dispatch_fh+000509 )
    [ 36] 0x0000000074e8d0d6 C:\Program Files\MATLAB\R2012b\bin\win64\m_dispatcher.dll+00053462 ( Mfunction_handle::dispatch+000854 )
    [ 37] 0x000007fee45751e5 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+01135077 ( inValidateLoadedObject+001893 )
    [ 38] 0x000007fee4584595 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+01197461 ( init_cleaner+015541 )
    [ 39] 0x000007fee4587b75 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+01211253 ( inSetMaxFrameCount+002261 )
    [ 40] 0x000007fee4587b48 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+01211208 ( inSetMaxFrameCount+002216 )
    [ 41] 0x000007fee4587b07 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+01211143 ( inSetMaxFrameCount+002151 )
    [ 42] 0x000007fee4470213 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+00066067 ( inPathNotification::function_clear_notification+004019 )
    [ 43] 0x000007fee457aed0 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+01158864 ( inEvalCmdWithLocalReturn+000416 )
    [ 44] 0x000007fee457ae2c C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+01158700 ( inEvalCmdWithLocalReturn+000252 )
    [ 45] 0x000007fee457ad71 C:\Program Files\MATLAB\R2012b\bin\win64\m_interpreter.dll+01158513 ( inEvalCmdWithLocalReturn+000065 )
    [ 46] 0x0000000079fbf90d C:\Program Files\MATLAB\R2012b\bin\win64\libmwbridge.dll+00063757 ( mnDebugPrompt+000109 )
    [ 47] 0x0000000079fc0471 C:\Program Files\MATLAB\R2012b\bin\win64\libmwbridge.dll+00066673 ( mnParser+000593 )
    [ 48] 0x00000000749a64a4   C:\Program Files\MATLAB\R2012b\bin\win64\mcr.dll+00222372 ( mcrInstance::mnParser_on_interpreter_thread+000036 )
    [ 49] 0x000000007498681f   C:\Program Files\MATLAB\R2012b\bin\win64\mcr.dll+00092191 ( mcr::setInterpreterThreadToCurrent+029887 )
    [ 50] 0x0000000074986881   C:\Program Files\MATLAB\R2012b\bin\win64\mcr.dll+00092289 ( mcr::setInterpreterThreadToCurrent+029985 )
    [ 51] 0x00000000063fe0b6   C:\Program Files\MATLAB\R2012b\bin\win64\uiw.dll+00385206 ( UIW_IsUserMessage+000086 )
    [ 52] 0x00000000063fe7b9   C:\Program Files\MATLAB\R2012b\bin\win64\uiw.dll+00387001 ( UIW_SetGLIMUserMsg+000153 )
    [ 53] 0x0000000076ae87fe                     C:\Windows\system32\USER32.dll+00165886 ( GetMenuBarInfo+000638 )
    [ 54] 0x0000000076acf5fb                     C:\Windows\system32\USER32.dll+00062971 ( SystemParametersInfoW+000235 )
    [ 55] 0x0000000076ad4895                     C:\Windows\system32\USER32.dll+00084117 ( IsProcessDPIAware+000465 )
    [ 56] 0x0000000076d311f5                      C:\Windows\SYSTEM32\ntdll.dll+00332277 ( KiUserCallbackDispatcher+000031 )
    [ 57] 0x0000000076ad908a                     C:\Windows\system32\USER32.dll+00102538 ( PeekMessageW+000186 )
    [ 58] 0x0000000076ad50fe                     C:\Windows\system32\USER32.dll+00086270 ( GetKeyState+000238 )
    [ 59] 0x0000000076ad3a6f                     C:\Windows\system32\USER32.dll+00080495 ( PeekMessageA+000087 )
    [ 60] 0x00000000063d8f4b   C:\Program Files\MATLAB\R2012b\bin\win64\uiw.dll+00233291 ( UIW_SetCurrentDialog+000731 )
    [ 61] 0x00000000063ffbe2   C:\Program Files\MATLAB\R2012b\bin\win64\uiw.dll+00392162 ( ws_FreeSystemFont+000546 )
    [ 62] 0x000000000485e6a3 C:\Program Files\MATLAB\R2012b\bin\win64\libmwservices.dll+00779939 ( sysq::removeCommitDatabaseUpdatesHook+002131 )
    [ 63] 0x000000000485fe18 C:\Program Files\MATLAB\R2012b\bin\win64\libmwservices.dll+00785944 ( sysq::removeCommitDatabaseUpdatesHook+008136 )
    [ 64] 0x0000000004861a20 C:\Program Files\MATLAB\R2012b\bin\win64\libmwservices.dll+00793120 ( sysq::addProcessPendingEventsUnitTestHook+000240 )
    [ 65] 0x0000000004861ae8 C:\Program Files\MATLAB\R2012b\bin\win64\libmwservices.dll+00793320 ( sysq::addProcessPendingEventsUnitTestHook+000440 )
    [ 66] 0x0000000004861ca3 C:\Program Files\MATLAB\R2012b\bin\win64\libmwservices.dll+00793763 ( sysq::addProcessPendingEventsUnitTestHook+000883 )
    [ 67] 0x0000000004861d76 C:\Program Files\MATLAB\R2012b\bin\win64\libmwservices.dll+00793974 ( sysq::addProcessPendingEventsUnitTestHook+001094 )
    [ 68] 0x000000007498837e   C:\Program Files\MATLAB\R2012b\bin\win64\mcr.dll+00099198 ( mcr::setInterpreterThreadToCurrent+036894 )
    [ 69] 0x0000000074988665   C:\Program Files\MATLAB\R2012b\bin\win64\mcr.dll+00099941 ( mcr::setInterpreterThreadToCurrent+037637 )
    [ 70] 0x000000007497b166   C:\Program Files\MATLAB\R2012b\bin\win64\mcr.dll+00045414 ( DepfunRules::postWarning+003430 )
    [ 71] 0x000000013fa48a33 C:\Program Files\MATLAB\R2012b\bin\win64\MATLAB.exe+00035379 ( ???+000000 )
    [ 72] 0x000000013fa48c97 C:\Program Files\MATLAB\R2012b\bin\win64\MATLAB.exe+00035991 ( ???+000000 )
    [ 73] 0x000000013fa49163 C:\Program Files\MATLAB\R2012b\bin\win64\MATLAB.exe+00037219 ( ???+000000 )
    [ 74] 0x0000000076bd59ed                   C:\Windows\system32\kernel32.dll+00088557 ( BaseThreadInitThunk+000013 )
    [ 75] 0x0000000076d0c541                      C:\Windows\SYSTEM32\ntdll.dll+00181569 ( RtlUserThreadStart+000033 )

Could someone help on this?

Answer 1

[James Tursa]

What code is in the loop? Are you sure you are not writing beyond the end of the data memory? What is the code after mexCallMATLAB?

[AP]

The loop is fine. The code works until it wants to execute mexCallMATLAB(3, OUT, 3, IN, "meshgrid"); and then fails and does not print Line After mexCallMATLAB.

[James Tursa]

I see nothing obviously wrong with what you have posted, so I am asking to see what you have not posted. What you have posted runs fine on my machine 1000's of times. That is why I suspect it is something you are not telling us or have not posted. So, again, what is the loop actually doing, and what is after the mexCallMATLAB call?