7.1.4 ERRORS--This statement causes the program to compute the row
 errors where "row error" is defined as the amount by which the
 current solution fails to satisfy the equations exactly. Three
 pieces of information are printed out: 1) the sum of the absolute
 values of the errors, 2) the largest absolute error, and 3) the
 row in which this occurs.


7.1.5 EXIT--This results in a page eject and then termination of the
 program.


7.1.6 GO--This control card calls the solution algorithm, but assumes
 that a basis already exists. Normally, this is used only after
 INVERT.


7.1.7 INVERT--This statement causes the inverse of the current basis to
 be created. This is typically only called after a preliminary
 basis is read in.


7.1.8 OUTPUT--This causes a "short output" to be printed and a BASIS*
 to be punched. (See PPRODE below).


7.1.9 PARAME--Solves the "long form problem" for all values of X. This
 is particularly useful in portfolio selection and risk programming
 problems. (See section 7.2.2 and [4).3


7.1.10 PUNCH--Punches out the current basis according to BASIS* format.
 Restart information is also provided if the current solution is
 feasible.


7.1.11 SETINV--This control sets the inversion frequency to (M/10) + 6,
 where M is the number of rows in the full problem. This should
 appear only after the matrix data has been read in.



 The objective function for the portfolio selection and risk pro-
gramming problems is set up as minimize XPx + X'QX where Q is a symmetric
(n x n) positive definite or semi-definite variance-covariance matrix.