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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>I have a model that occasionally gets lost in the weeds.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Cbc0010I After 6200 nodes, 4814 on tree, 1e+50 best solution, best possible 0 (97.67 seconds)<o:p></o:p></p><p class=MsoNormal>Cbc0020I Exiting on maximum time<o:p></o:p></p><p class=MsoNormal>Cbc0005I Partial search - best objective 1e+50 (best possible 0), took 549614 iterations and 6236 nodes (100.02 seconds)<o:p></o:p></p><p class=MsoNormal>Cbc0035I Maximum depth 4816, 0 variables fixed on reduced cost<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>My confusion stems from the reported maximum depth of 4816. I have only 270 (sos) objects in the model.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It would seem that by the time I reach 270 I could judge this node integer feasible or not, and continue in shallower depths. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is this behavior by design, and if, as I suspect, it is, are there situations where this strategy is effective? Maybe even my situation?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Additional info: In my situation, there is an order to the objects that will reliably give you an infeasible/integer solution judgment by the time you reach 270. I have prioritized the objects in this order and turned off strong branching. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>What would happen if I hacked the branch decision logic to just never split the last level? Is branch logic where I will be spending my time in the future?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks for any light you can shed.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>jkh<o:p></o:p></p></div></body></html>