怎么获得产品下面一个零件的document信息啊？

lyy4566

CATDocument * pProductDocument = NULL;
rc = CATDocumentServices::OpenDocument("E:\\14V_1\\ass2\\r14WK.CATProduct",pProductDocument);

if ( FAILED(rc) || (NULL == pProductDocument) )  AfxMessageBox(_T("2!"));
/* ----------------------------*/
/* 2. Retrieves Root Product   */
/* ----------------------------*/


// Begin navigation through the document => start with the RootProduct.
CATIDocRoots* piDocRootsOnDoc = NULL;
rc = pProductDocument->QueryInterface(IID_CATIDocRoots,
  (void**) &piDocRootsOnDoc);
if ( FAILED(rc) ) AfxMessageBox(_T("3!"));
// get the root product which is the first element of root elements
CATListValCATBaseUnknown_var * pRootProducts =
  piDocRootsOnDoc->GiveDocRoots();
CATIProduct_var spRootProduct = NULL_var;

     if (pRootProducts && pRootProducts->Size())
{   
  spRootProduct = (*pRootProducts)[1];
          delete   pRootProducts;
    pRootProducts=NULL;
}
     piDocRootsOnDoc->Release();


// Get CATIProduct handle on the root product.
CATIProduct *piProductOnRoot = NULL;
rc = spRootProduct->QueryInterface(IID_CATIProduct,
  (void**) &piProductOnRoot);
if ( FAILED(rc) ) AfxMessageBox(_T("3!"));

/* --------------------------------------------------------- */
/*   Imports an existing CATProduct under the root product.   */
/* --------------------------------------------------------- */
CATDocument *pDocPart = NULL;
CATIProduct *piInstanceProd = NULL;

// load the given CATPart
rc = CATDocumentServices::OpenDocument(ifileName,pDocPart);
if ( FAILED(rc) || (NULL==pDocPart) ) AfxMessageBox(_T("4!"));
// agregates an instance of the CATPart root element under the product
rc = OpenResource::AddExternalComponent(piProductOnRoot,pDocPart,&piInstanceProd);
if ( FAILED(rc) ) AfxMessageBox(_T("5!"));
/* ---------------------------------------*/
/* 3. Retrieves children under the root   */
/* ---------------------------------------*/

// then on a root product, get all the children agregated to it.
CATListValCATBaseUnknown_var*   ListChildren = piProductOnRoot->GetChildren("CATIProduct");
/** @anchor err_2 piProductOnRoot not set to NULL after release */  
int numberOfChildren = 0;
numberOfChildren = ListChildren->Size();
CString str;
    str.Format(_T("%d"), numberOfChildren);
     AfxMessageBox(str);
   
/* -----------------------------------------------------------*/
/*  4. For each child, get its partNumber, and InstanceName   */
/* -----------------------------------------------------------*/
CATIProduct_var spChild = NULL_var;
    CATIProduct_var spChild1 = NULL_var;

  spChild = (*ListChildren)[6];
    spChild1 = (*ListChildren)[7];   

spChild->GetShapeRep(spCATILinkableObject ,"Default", CATPrd3D, TRUE);
  CATDocument * pCATDocument=NULL;
  pCATDocument=spCATILinkableObject->GetDocument();
CATInit  *pInitOnDoc=NULL ;
pCATDocument->QueryInterface(IID_CATInit,(void **) &pInitOnDoc);
CATIPrtContainer *pPrtCont = NULL ;
  pPrtCont=  (CATIPrtContainer*) pInitOnDoc->GetRootContainer("CATIPrtContainer");
    CATIPrtPart_var spPart = pPrtCont->GetPart();

为什么编译的时候能够成功，而在运行的时候到最后一句CATIPrtPart_var spPart = pPrtCont->GetPart();就出错啊？

新人刚学CAA，求高人指教！不甚感激！
这几天被搞得没有信心学了啊....

lyy4566

linlily0925

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一朵梨花

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