Hi,
im testing with a model with semi-continuous bounds:
min: + 5.77 * b + 5.76 * a;
a <= 1;
y: + b + a = 100;
2 <= a <= 100;
sec a;
lpsolve converts the lp-model to mps:
*<meta creator='lp_solve v5.5'>
*<meta rows=1>
*<meta columns=2>
*<meta equalities=1>
*<meta integers=0>
*<meta scvars=1>
*<meta origsense='MIN'>
*
NAME LPSolver
ROWS
N R0
E y
COLUMNS
b R0 5.7700000000 y 1.0000000000
a R0 5.7600000000 y 1.0000000000
RHS
RHS y 100.00000000
BOUNDS
LO BND a 2.0000000000
SC BND a 1.0000000000
ENDATA
the LO and SC bound are swapped.
in a bigger example SC was set to "100" but i cant recreate it as small example.
I know that this bound is not "good". But i think i should be interpreted as " a = 0".
Am I wrong?
Thank you,
Ralf