coin-or/Dip

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DIP is a decomposition-based solver framework for mixed integer linear programs.

Stars: 22
Forks: 9
Open beginner issues: 0
Indexed issues: 82

Dominant language: C++
License: EPL-1.0
Last GitHub push: Jan 14, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Open All

82 open issues indexed

COIN_HAS_CBC x DIP_HAS_CBC Open

bug

coin-or/Dip#99 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
No bounds checking in MILPBlock Open

bug

coin-or/Dip#2 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
wishlist - pre/post solve added to DIP Open

enhancement

coin-or/Dip#5 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
user provided init var in block case - force incubment into system Open

enhancement

coin-or/Dip#6 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
RoundRobinStategy is not implemented Open

enhancement

coin-or/Dip#8 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AP3 example Open

bug

coin-or/Dip#10 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
new option to use col pool for master as IP Open

enhancement

coin-or/Dip#12 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
UtilPrintMemUsage won't compile with gcc 4.5.0 on MSys MinGW Open

bug

coin-or/Dip#13 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
column generator use multiple solutions if MILP solver provides it Open

bug

coin-or/Dip#14 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
resdesign LB calculation to use LBs of subproblems, not varRedCost Open

enhancement

coin-or/Dip#15 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
masterMatrixAddArtCol is too slow for large scale Open

enhancement

coin-or/Dip#16 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
cutgen OSI object is currently adding in A' blocks by default Open

bug

coin-or/Dip#17 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
gen init vars provides a valid LB, use it Open

bug

coin-or/Dip#18 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
integrate finder for block angular to MilpBlock Open

enhancement

coin-or/Dip#19 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Artificial variables in createMasterProblem cause crash in isParallel Open

bug

coin-or/Dip#22 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
UseSparse and InitVarsWithIP not working together Open

bug

coin-or/Dip#25 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
problem with MILPBlock example on Mac OS X. Open

bug

coin-or/Dip#28 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
enhance solveRelaxed to allow parallel processing of blocks Open

enhancement

coin-or/Dip#30 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
make api for master-only vars more simple Open

enhancement

coin-or/Dip#32 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
make explicit examples for different variants of GAP example for illustration Open

enhancement

coin-or/Dip#34 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
create small simple example to show master-only cols Open

enhancement

coin-or/Dip#35 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
boost for VRP/TSP - download only those files needed rather than all of boost Open

bug

coin-or/Dip#36 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
VRP/TSP concorde - linked LP solver should be driven by DIP config, or example config Open

bug

coin-or/Dip#37 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Error: CBC IP solver 2nd status = 7 Open

bug

coin-or/Dip#38 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
create SmallIP example to illustrate multiple blocks (like MILPBlock) Open

enhancement

coin-or/Dip#40 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Set options in C++ code Open

enhancement

coin-or/Dip#41 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Problem with bounds produced by Alps at node 0 Open

bug

coin-or/Dip#43 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
use pfunc for threading of blocks Open

enhancement

coin-or/Dip#48 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
create simplex example with multiple blocks, implicit poly and master-only vars Open

enhancement

coin-or/Dip#49 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
create version of DecompVar that doesn't need convexDual Open

enhancement

coin-or/Dip#50 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
remove need for user to define master-only vars when relax poly is explicitly defined Open

enhancement

coin-or/Dip#51 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
create simple object for master-only variables Open

enhancement

coin-or/Dip#52 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
add extreme rays, remove need for artificially bounded subproblems Open

enhancement

coin-or/Dip#54 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
No heuristics used if no cuts generated Open

bug

coin-or/Dip#58 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
(MILPBlock) "Point violates row" with large relative violation Open

bug

coin-or/Dip#59 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
allow core range constraints Open

enhancement

coin-or/Dip#61 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Solving master problems using interior point method Open

bug

coin-or/Dip#62 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
False "Problem infeasible" Open

bug

coin-or/Dip#63 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Primal heuristic "Recomposed solution is not feasible " error Open

bug

coin-or/Dip#64 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
" too large an index" error Open

bug

coin-or/Dip#65 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
False "Problem infeasible" (different from #63) Open

bug

coin-or/Dip#66 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
LimitTime => infinite loop Open

bug

coin-or/Dip#68 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
"Double Free or corrupton" error Open

bug

coin-or/Dip#69 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
integer objective coefficients and integer variables Open

enhancement

coin-or/Dip#71 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
autodetect <= for master convexity constraint Open

bug

coin-or/Dip#74 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
breakoutPartial only if general integer in compact Open

bug

coin-or/Dip#75 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Parameters aren't applied as expected Open

bug

coin-or/Dip#79 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Download source for external solvers to the source directory Open

enhancement

coin-or/Dip#80 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Add signal handling Open

enhancement

coin-or/Dip#81 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Infinite loop in DIP Open

bug

coin-or/Dip#82 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026

coin-or/Dip

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