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I have two nodes, each have two child nodes, I expand the two nodes, and run this code:

   m_tree.ItemRemove(m_htRoot1Node1, false, false);
   m_tree.ItemRemove(m_htRoot1Node2, false, false);
   m_tree.ItemHide(m_htRoot1, true, false); 
   m_tree.ItemRemove(m_htRoot2Node1, false, false);
   m_tree.ItemRemove(m_htRoot2Node2, false, false);
   m_tree.OnSwUpdateScrollBars();
   m_tree.OnSwDoRedraw();

The application crash.

I am sending you also an application which demonstate this bug.

This is the location:

#ifdef _DEBUG
            if( LPVOID(pNode) != LPVOID(m_pCellRoot) )
            {
                CExtTreeGridCellNode * pDebugTestNode = m_arrGridVis.GetAt( nVisibleOffset );
                ASSERT_VALID( pDebugTestNode );
                ASSERT( LPCVOID(pDebugTestNode) == LPCVOID(pNode) ); <== HERE!
            } // if( LPVOID(pNode) == LPVOID(m_pCellRoot) )
#endif // _DEBUG

Please try to solve this ASAP, as we need this feature working.

Thanks,

Ron.