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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>After applying recent SOS fixes, the below model is solved correctly with an objective value of zero.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>However, I am trying to use the cbc interface dll. As it has no readLp, I added one.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:#6F008A'>COINLIBAPI</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>int</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:#6F008A'>COINLINKAGE</span><span style='font-size:9.5pt;font-family:Consolas;color:black'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'>Cbc_readLp(</span><span style='font-size:9.5pt;font-family:Consolas;color:#2B91AF'>Cbc_Model</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> * </span><span style='font-size:9.5pt;font-family:Consolas;color:gray'>model</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>, </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>const</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>char</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> *</span><span style='font-size:9.5pt;font-family:Consolas;color:gray'>filename</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'>{<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>const</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>char</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> prefix[] = </span><span style='font-size:9.5pt;font-family:Consolas;color:#A31515'>"Cbc_C_Interface::Cbc_readLp(): "</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:green'>// const int VERBOSE = 2;</span><span style='font-size:9.5pt;font-family:Consolas;color:black'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>if</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> (VERBOSE > 0) printf(</span><span style='font-size:9.5pt;font-family:Consolas;color:#A31515'>"%s begin\n"</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>, prefix);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>if</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> (VERBOSE > 1) printf(</span><span style='font-size:9.5pt;font-family:Consolas;color:#A31515'>"%s filename = '%s'\n"</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>, prefix, </span><span style='font-size:9.5pt;font-family:Consolas;color:gray'>filename</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>auto</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> clpSolver = </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>dynamic_cast</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>< </span><span style='font-size:9.5pt;font-family:Consolas;color:#2B91AF'>OsiClpSolverInterface</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>*> (</span><span style='font-size:9.5pt;font-family:Consolas;color:gray'>model</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>->model_->solver());<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>int</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> result = 1;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:green'>//result = model->model_->solver()->readLp(filename);</span><span style='font-size:9.5pt;font-family:Consolas;color:black'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'> result = clpSolver->readLp(</span><span style='font-size:9.5pt;font-family:Consolas;color:gray'>filename</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:#6F008A'>assert</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>(result == 0);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>if</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> (VERBOSE > 0) printf(</span><span style='font-size:9.5pt;font-family:Consolas;color:#A31515'>"%s return %i\n"</span><span style='font-size:9.5pt;font-family:Consolas;color:black'>, prefix, result);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'> </span><span style='font-size:9.5pt;font-family:Consolas;color:blue'>return</span><span style='font-size:9.5pt;font-family:Consolas;color:black'> result;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'>}<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:black'><o:p> </o:p></span></p><p class=MsoNormal>When I route the model thru the interface, It appears to lose the SOS sets and gives me an unbounded result.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I would value any insights or better, a workaround/fix to enable my scenario. Is it CbcModel vs. Cbc_Model?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks for any assistance,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>jkh<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>MAXIMIZE<o:p></o:p></p><p class=MsoNormal>+HS_pos <o:p></o:p></p><p class=MsoNormal>SUBJECT TO<o:p></o:p></p><p class=MsoNormal>HS_free: -HS_@free +HS_free = 0<o:p></o:p></p><p class=MsoNormal>HS_P0_diff: +HS_free +HS_P0_diff -HS_pos = 0<o:p></o:p></p><p class=MsoNormal>HS_P0_sum: +HS_P0_y +HS_P0_z = 1<o:p></o:p></p><p class=MsoNormal>HS_pos: -HS_@pos +HS_pos = 0<o:p></o:p></p><p class=MsoNormal>BOUNDS<o:p></o:p></p><p class=MsoNormal>HS_@free free<o:p></o:p></p><p class=MsoNormal>HS_@pos free<o:p></o:p></p><p class=MsoNormal>HS_free = -50000<o:p></o:p></p><p class=MsoNormal>BINARY<o:p></o:p></p><p class=MsoNormal>HS_P0_y HS_P0_z <o:p></o:p></p><p class=MsoNormal>SOS<o:p></o:p></p><p class=MsoNormal>S0: S1:: HS_pos:1 HS_P0_y:2 <o:p></o:p></p><p class=MsoNormal>S1: S1:: HS_P0_diff:1 HS_P0_z:2 <o:p></o:p></p><p class=MsoNormal>END<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>