Hello, I have a column-generation problem I'm trying to switch over from AMPL/CPLEX to GLPK, and it would be useful to be able to display the dual values in MathProg. I know that suffixes are not supported in the official release, but I saw the following:
An unofficial patched version of a last year GLPK release can be > checked out with subversion > > svn co http://glpk.dyndns.org/svn/glpk/branches/glpk-4.38-dot/ > > It supports the following suffixes in the post solution phase: > > variables > lb - lower bound > ub - upper bound > val - value > dual - dual value > basic - 1 if variable is basic > > constraints > lb - lower bound > ub - upper bound > dual - dual value > value - value > > I downloaded this version using "vn co http://glpk.dyndns.org/svn/glpk/branches/glpk-4.38-dot/"; then compiled it (configure, make, make install). The compile appears successful, and when I check the date/timestamp on my glpsol, it shows the current date/time. When I try to use the ".dual" functionality as follows: "display summation_constraint.dual;" I get an error message: "Reading model section from test_cur1_2.mod... test_cur1_2.mod:67: invalid reference to constraint summation_constraint Context: ...f MaxCHarn >> '...' ; solve ; display summation_constraint . GLPK: model processing error" Did I download the correct version? Thanks, Greg
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