[SOLVED] ACCVIO when calling ShowHeaderRows(FALSE)

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Hi;

I created the header records portion of a report control this way:

    Report_.GetHeaderRecords()->RemoveAll();

    CXTPReportRecord* Record=Report_.GetHeaderRecords()->Add(new CXTPReportRecord());

    for (int i=0; i<Report_.GetColumns()->GetCount(); i++) {
        if (i<13) {
            CXTPReportRecordItem* Item=Record->AddItem(new CXTPReportRecordItem());
            Item->SetEditable(FALSE);
        } else {
            CXTPReportRecordItem* Item=Record->AddItem(new CXTPReportRecordItemText());
            Item->SetEditable(TRUE);
        }
    }

    Report_.HeaderRowsAllowEdit(TRUE);
    Report_.HeaderRowsEnableSelection(FALSE);

The header row is used to define custom filtering conditions. When the user finished filtering I call this function:

void CCompoundReport::ClearFilter() {

    BeginWaitCursor();

    Report_.BeginUpdate();

    CXTPReportRecord* Record=Report_.GetHeaderRecords()->GetAt(0);
    for (int i=0; i<Report_.GetColumns()->GetCount(); i++) {
        CCompoundReportColumn* Column=reinterpret_cast<CCompoundReportColumn*>(Report_.GetColumns()->GetAt(i));
        if (Column->GetItemData()!=0) {
            CXTPReportRecordItemText* Item=DYNAMIC_DOWNCAST(CXTPReportRecordItemText, Record->GetItem(i));
            if (Item!=0)
                Item->SetValue(_T(""));
        }
    }

    for (int i=0; i<Report_.GetRecords()->GetCount(); i++) {
        Report_.GetRecords()->GetAt(i)->SetVisible(TRUE);
    }

    Report_.Populate();
    Report_.ShowHeaderRows(FALSE);
    Report_.EndUpdate();

    IsFiltered_=false;

    EndWaitCursor();
}

As soon as I call ShowHeaderRows(FALSE) I get the ACCVIO below. I tried to put the call elsewhere in code and it ALWAYS crashes. CXTPReportSection *pSection = pRow->GetSection(); in CXTPReportSections::EnsureVisible is a NULL pointer

Call stack:

ToolkitPro1513vc90UD.dll!CXTPReportRow::GetSection()  Zeile 814 + 0x3 Bytes    C++
     ToolkitPro1513vc90UD.dll!CXTPReportSections::EnsureVisible(CDC * pDC=0x0013df88, CXTPReportRow * pRow=0x00000000)  Zeile 86 + 0x8 Bytes    C++
     ToolkitPro1513vc90UD.dll!CXTPReportControl::EnsureVisible(CXTPReportRow * pRow=0x00000000)  Zeile 2031 + 0x23 Bytes    C++
     ToolkitPro1513vc90UD.dll!CXTPReportControl::SetFocusedRow(int bEnsureVisible=0x00000001, CXTPReportRow * pRow=0x00000000, int bShiftKey=0x00000000, int bControlKey=0x00000000)  Zeile 1944    C++
     ToolkitPro1513vc90UD.dll!CXTPReportControl::SetFocusedRow(CXTPReportRow * pRow=0x00000000, int bControlKey=0x00000000)  Zeile 1768    C++
     ToolkitPro1513vc90UD.dll!CXTPReportNavigator::MoveFirstVisibleRow(XTPReportRowType TargetType=xtpRowTypeBody)  Zeile 532    C++
     ToolkitPro1513vc90UD.dll!CXTPReportNavigator::SetCurrentFocusInHeadersRows(int bCurrentFocusInHeadersRows=0x00000000)  Zeile 483    C++
>    ToolkitPro1513vc90UD.dll!CXTPReportControl::ShowHeaderRows(int bShow=0x00000000)  Zeile 139    C++
     XRMiniLIMS.exe!CCompoundReport::ClearFilter()  Zeile 855 + 0x13 Bytes    C++
     XRMiniLIMS.exe!CReportingWnd::ClearFilter()  Zeile 230    C++
     XRMiniLIMS.exe!CMiniLIMSFrameWnd::OnReportingClearFilter()  Zeile 2184    C++

How can I fix this?