Hi I have been trying to run a network flow and get integer values for the flows. Objective is to use generalized network as nodes L1, L2 has to be visited only once. However, I am unable to get integer values for the formulation. For some reason, interior point algorithm is triggered and not network simplex optimizer. I am not sure if I have used the right way to specify the lower and upper bounds. Please let me know if I am missing something. /*
_from_ = from node, _to_ = to node, _cost_ = cost to objective function, _mult_ = multiplier, _ lo_ = lower_bound , _up_ = upper_bound
*/
proc netflow
arcdata = garcs
nodedata = gnodes
conout = gnetout
source=A1
sink=COLLECT;
capacity _up_;
lo _lo_;
mult _mult_;
cost _cost_;
run;
data gnodes;
infile datalines dlm="|";
input _node_ :$25. _sd_ :8.;
datalines;
A1|1
COLLECT|-3
;
run;
/*
_from_ = from node, _to_ = to node, _cost_ = cost to objective function, _mult_ = multiplier, _ lo_ = lower_bound , _up_ = upper_bound
*/
data garcs;
infile datalines dlm="|";
input _from_ :$25. _to_ :$25. _cost_ :8. _mult_ :8. _lo_ :8. _up_ :8.;
datalines;
A1|L1T0|19|1|0|1
A1|L2T0|1|1|0|1
L1T0|L1T0P|0|2|0|1
L2T0|L2T0P|0|2|0|1
L1T0P|L1SUPER|0|1|0|1
L1T0P|L2T1|7|1|0|1
L2T0P|L2SUPER|0|1|0|1
L2T0P|L1T1|4|1|0|1
L1T1|L1T1P|0|2|0|1
L2T1|L2T1P|0|2|0|1
L1T1P|L1SUPER|0|1|0|1
L2T1P|L2SUPER|0|1|0|1
L1T1P|A1SINK|116|1|0|1
L2T1P|A1SINK|95|1|0|1
L1SUPER|COLLECT|0|1|0|1
L2SUPER|COLLECT|0|1|0|1
A1SINK|COLLECT|0|1|0|1
;
run;
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