               full rank), for DICO = 'C' and JOBE = 'I'.
          The options JOBD = 'D' and JOBD = 'F' produce the same
          results, but much less memory is needed for JOBD = 'F'.

  CKPROP  CHARACTER*1
          If DICO = 'C' and JOBE &lt;&gt; 'I', specifies whether the user
          wishes to check the properness of the transfer function of
          the descriptor system, as follows:
          = 'C':  check the properness;
          = 'N':  do not check the properness.
          If the test is 