U@OPENVERTEX
U@OPENVERTEX opens the Vertex Quantum Database files and prepares them for use. This routine must be called before either U@CLOSEVERTEX or U@CALCVTXTAX is called.
U@OPENVERTEX opens the Vertex Quantum Database files and prepares them for use. This routine must be called before either U@CLOSEVERTEX or U@CALCVTXTAX is called.