The output is generated without any TRACK specification (or TRACK 0):

   ====================================================================
 
        COLUMN  NO.     1  DESIGN PER MEX NTC-87 - AXIAL + BENDING
 

 
   FY - 411.9  FC -  19.6 MPa     SQRE SIZE   30.0 x  30.0 (mm) TIED

           AREA OF STEEL REQUIRED =1422.857
 
   BAR CONFIGURATION       REINF PCT.   LOAD   LOCATION   PHI
   ----------------------------------------------------------
 
    12 - NUMBER  4           1.693        1      END     0.700
   (PROVIDE EQUAL NUMBER OF BARS ON EACH FACE)

TRACK 1 generates the following additional output:

       COLUMN INTERACTION: MOMENT ABOUT Z -AXIS (KN-MET)
 
    --------------------------------------------------------
       P0          Pn max        P-bal.       M-bal.      e-bal.(mm)
       1807.71      1807.71       472.28        89.02      18.8
       M0          P-tens.       Des.Pn      'Des.Mn     e/h
         66.71      -627.70       106.12        35.18    0.074
    -----------------------------------------------------------------------
 
       COLUMN INTERACTION: MOMENT ABOUT Y -AXIS (KN-MET)
 
    --------------------------------------------------------
       P0          Pn max        P-bal.       M-bal.      e-bal.(mm)
       1807.71      1807.71       472.28        89.02      18.8
       M0          P-tens.       Des.Pn      'Des.Mn     e/h
         66.71      -627.70       106.12        44.63    0.093
    -----------------------------------------------------------------------

TRACK 2 generates the interaction diagram output in addition to all the above:

                            Pn          Mn          Pn          Mn       (@ Z )
            |                1668.66       12.60      834.33       76.51
         P0 |*               1529.60       29.22      695.27       81.63
            | *              1390.55       43.18      556.22       86.29
      Pn,max|__*             1251.49       54.53      417.16       87.72
            |   *            1112.44       63.31      278.11       83.38
      Pn    |    *            973.38       70.55      139.05       76.67
     NOMINAL|     *         Pn          Mn          Pn          Mn       (@ Y )
       AXIAL|      *         1668.66       12.60      834.33       76.51
 COMPRESSION|       *        1529.60       29.22      695.27       81.63
          Pb|-------*Mb      1390.55       43.18      556.22       86.29
            |      *         1251.49       54.53      417.16       87.72
 ___________|____*_______    1112.44       63.31      278.11       83.38
            |  * M0   Mn,     973.38       70.55      139.05       76.67
            | *   BENDING
      P-tens|*     MOMENT
            |