Unknown error using DWork Vector

Hi,

I get an error for using DWork vector. The error occurs when I run the simulink model second time. Running for the first time goes smooth but when I run again, Matlab just shuts down. I suspected it to be some memory management problem. Can you give me an advice to make it better. I put the part of the code below where DWork Vectors are defined and used. The complete codes are also attached.

...
#define NDWORKS              3
// DWork 1
#define DWORK_0_NAME         combState
#define DWORK_0_WIDTH        1
#define DWORK_0_DTYPE        real_T
#define DWORK_0_COMPLEX      COMPLEX_NO
// DWork 2
#define DWORK_1_NAME         phiIg
#define DWORK_1_WIDTH        1
#define DWORK_1_DTYPE        real_T
#define DWORK_1_COMPLEX      COMPLEX_NO
// DWork 3
#define DWORK_2_NAME         mqf
#define DWORK_2_WIDTH        1
#define DWORK_2_DTYPE        real_T
#define DWORK_2_COMPLEX      COMPLEX_NO

static void mdlInitializeSizes(SimStruct *S)
{
...
    /*initialzation of sizes related to DWork Vectors*/
    ssSetNumDWork(S,NDWORKS);
    /*DWork vector 1*/
    ssSetDWorkWidth(S, 0, DWORK_0_WIDTH);
    ssSetDWorkDataType(S, 0, SS_DOUBLE);
    /*DWork vector 2*/    
    ssSetDWorkWidth(S, 1, DWORK_1_WIDTH);
    ssSetDWorkDataType(S, 1, SS_DOUBLE);
    /*DWork vector 3*/
    ssSetDWorkWidth(S, 2, DWORK_2_WIDTH);
    ssSetDWorkDataType(S, 2, SS_DOUBLE);    
...
}
...
static void mdlInitializeConditions(SimStruct *S)
{
 #define MDL_INITIALIZE_CONDITIONS
/* Function: mdlInitializeConditions ============================
* Abstract:
* Initialize both continuous states to zero
*/
  real_T *x1 = (real_T*) ssGetDWork(S,0);
  real_T *x2 = (real_T*) ssGetDWork(S,1);
  real_T *x3 = (real_T*) ssGetDWork(S,2);

    /* Initialize the dwork to 0 */
    x1[0] = 0;  // combustion state
    x2[0] = 0;  // ignition delay
    x3[0] = 0;  // mass of fuel injected
}
...
static void mdlOutputs(SimStruct *S, int_T tid)
{
    const real_T   *phi  = (const real_T*) ssGetInputPortSignal(S,0);
    const real_T   *phiInj  = (const real_T*) ssGetInputPortSignal(S,1);
    const real_T   *uGov  = (const real_T*) ssGetInputPortSignal(S,2);
    const real_T   *omega  = (const real_T*) ssGetInputPortSignal(S,3);
    const real_T   *p  = (const real_T*) ssGetInputPortSignal(S,4);
    const real_T   *temp  = (const real_T*) ssGetInputPortSignal(S,5);
    real_T        *combStateO  = (real_T *)ssGetOutputPortRealSignal(S,0);
    real_T        *phiComb  = (real_T *)ssGetOutputPortRealSignal(S,1);
    real_T        *phiIgO  = (real_T *)ssGetOutputPortRealSignal(S,2);
    real_T        *mqfO  = (real_T *)ssGetOutputPortRealSignal(S,3);
    const int_T   p_width0  = mxGetNumberOfElements(PARAM_DEF0(S));
    const int_T   p_width1  = mxGetNumberOfElements(PARAM_DEF1(S));
    const real_T  *mqfCycMax  = (const real_T *)mxGetData(PARAM_DEF0(S));
    const real_T  *wiebePara  = (const real_T *)mxGetData(PARAM_DEF1(S));
    const real_T *combState = (const real_T*) ssGetDWork(S,0);
    const real_T *phiIg = (const real_T*) ssGetDWork(S,1);
    const real_T *mqf = (const real_T*) ssGetDWork(S,2);

    combState_Outputs_wrapper(phi, phiInj, uGov, omega, temp, p, combState, 
            phiIg, mqf, combStateO, phiComb, phiIgO, mqfO, mqfCycMax, 
            p_width0, wiebePara, p_width1);
}
...
static void mdlUpdate(SimStruct *S, int_T tid)
  {
    const real_T   *phi  = (const real_T*) ssGetInputPortSignal(S,0);
    const real_T   *phiInj  = (const real_T*) ssGetInputPortSignal(S,1);
    const real_T   *uGov  = (const real_T*) ssGetInputPortSignal(S,2);
    const real_T   *omega  = (const real_T*) ssGetInputPortSignal(S,3);
    const real_T   *p  = (const real_T*) ssGetInputPortSignal(S,4);
    const real_T   *temp  = (const real_T*) ssGetInputPortSignal(S,5);
    const real_T  *combStateO  = (const real_T *)ssGetOutputPortRealSignal(S,0);
    const real_T  *phiComb  = (const real_T *)ssGetOutputPortRealSignal(S,1);
    const real_T  *phiIgO  = (const real_T *)ssGetOutputPortRealSignal(S,2);
    const real_T  *mqfO  = (const real_T *)ssGetOutputPortRealSignal(S,3);
    const int_T   p_width0  = mxGetNumberOfElements(PARAM_DEF0(S));
    const int_T   p_width1  = mxGetNumberOfElements(PARAM_DEF1(S));
    const real_T  *mqfCycMax  = (const real_T *)mxGetData(PARAM_DEF0(S));
    const real_T  *wiebePara  = (const real_T *)mxGetData(PARAM_DEF1(S));
    real_T *combState = (real_T*) ssGetDWork(S,0);
    real_T *phiIg = (real_T*) ssGetDWork(S,1);
    real_T *mqf = (real_T*) ssGetDWork(S,2);
    /*
    combState_Update_wrapper(phi, phiInj, uGov, omega, temp, p, combState, 
            phiIg, mqf, combStateO, phiComb, phiIgO, mqfO, mqfCycMax, 
            p_width0, wiebePara, p_width1);
     */
    *combState = *combStateO;
    *mqf = *mqfO;
    *phiIg = *phiIgO;
}
...

[Geoff Hayes]

Koosup - Please include the error message that you observe from the second run of the model.