S4ProgramVariableRead returns -515 [WebWare SDK]

The following is my class constructor and destructor in which I was initializing the zcrosscorr matlab routines.

//code

CbinCorrelation::CbinCorrelation() {
 disparityMax = NULL;
 disparityMin = NULL;
 imgRegionR.imgData = NULL;
 imgRegionL.imgData = NULL;
 initialized = 1;

 //Temp display windows
 cvNamedWindow("ContourImageRight", 0);
 cvNamedWindow("ContourImageLeft", 0);
 cvNamedWindow("Initial Right", 0);
 cvNamedWindow("Initial Left", 0);

 /* Call the mclInitializeApplication routine. Make sure that the application
     * was initialized properly by checking the return status. This initialization
     * has to be done before calling any MATLAB API's or MATLAB Compiler generated
     * shared library functions.  */
 mclInitializeApplication(NULL, 0);

 if (!zcrosscorrInitialize()) {
  fprintf(stderr, "Unable to initialize Zcrosscorr library!");
  initialized = 0;
 }
}

CbinCorrelation::~CbinCorrelation() {
 //Free used memory
 if (disparityMax != NULL) {
  delete [] disparityMin;
  delete [] disparityMax;
 }
 if (imgRegionR.imgData != NULL) {
  delete [] imgRegionR.imgData[0];
  delete [] imgRegionR.imgData;
  imgRegionR.imgData = NULL;
 }
 if (imgRegionL.imgData != NULL) {
  delete [] imgRegionL.imgData[0];
  delete [] imgRegionL.imgData;
  imgRegionL.imgData = NULL;
 }

 if (initialized) {
  zcrosscorrTerminate();
 }

 mclTerminateApplication(); //terminate all matlab libs
 //Temp display window cleanup
 cvDestroyWindow("ContourImageRight");
 cvDestroyWindow("ContourImageLeft");
 cvDestroyWindow("Initial Right");
 cvDestroyWindow("Initial Left");
}

//end code

CRobot::Move is called from a dialog when a button press is registered and after the the needed parameters have been calculated. S4VariableRead is called within CRobot::ProgramVariableRead which is called by CRobot::Move. This method is also provided.

//code

double CRobot::Move(float xTail, float yTail, float xCentroid, float yCentroid, int breast)
{ 
 double theta;
 
 
 
 ProgramNumVarWrite("breast",(float)breast);

    theta = atan2((yTail - yCentroid), (xTail - xCentroid));

 if(ProgramVariableRead("currentPos",m_robtarget.m_lpDispatch))
 {
  m_robtarget.SetPos(0, xTail-95*cos(theta)); //-95*cos(theta)-20*sin(theta)
  m_robtarget.SetPos(1, yTail-95*sin(theta)); //-95*sin(theta)+20*cos(theta)
 }

 ProgramVariableWrite("currentPos", m_robtarget.m_lpDispatch);
 
 theta = atan2((yCentroid - yTail), (xTail - xCentroid));
 theta = (theta * 180)/PI;
 ProgramNumVarWrite("thethaChange",(float)theta);
 
 RunProgramOnce();

 return theta;

}

 

 

bool CRobot::ProgramVariableRead(LPCTSTR varname, LPDISPATCH value)
{
 short status = m_helper->S4ProgramVariableRead(varname, 0, value);
 if(status)
 {
  CString ErrorMsg;
  ErrorMsg.Format("Error reading '%s', status = %i",varname,status);
  AfxMessageBox(ErrorMsg,MB_OK | MB_ICONSTOP);
  return false;
 }
 return true;
}

//end code

When I changed the class constructor and destructor for CbinCorrelation to not include zcrosscorrInitialize and zcrosscorrTerminate, and instead made seperate function calls within CbinCorrelation so I could call these methods from OnInitDialog it allowed S4ProgramVariableRead to work. However, leaving these initialization calls inside the constructor for my class causes the S4ProgramVariableRead to fail and return -515.

Sorry, for not initially including my code. If more specifics are needed just let me know. Thanks for your help.