reset;
# Load the LP model and instantiate it with data
model resconstr.mod;
data gtc-resconst.dat;

# instruct AMPL to use CPLEX as the solver 
option solver cplex;

# instruct CPLEX to maintain sensitivity analysis information
option cplex_options 'sensitivity';

# turn off AMPL preprocessing
option presolve 0;

# solve LP, display optimal solution
solve;

#
display x.rc,x.down,x.current,x.up;