<span class="gmail_quote"></span>
<div>Hi All</div>
<div> </div>
<div>Im working on a COIN based project, where I have implemented a model in FLOPC++ and until now solved the model using CBC through the OsiCbcSolverInterface, which has worked great.</div>
<div> </div>
<div>I would like to pump up the speed of the computation, so Im trying to solve the problem instances using the Xpress solver.</div>
<div> </div>
<div>Unfortunately I am getting the following error: </div>
<div> </div>
<div>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div>Xpress-Optimizer v18.10.00<br>Hyper capacity, MIP (10 threads), Barrier (10 threads), Network, QP/MIQP<br>(c) Copyright Dash Associates 1984-2007</div>
<div> </div>
<div>incrementInstanceCounter:: numInstances 0</div>
<div>incrementInstanceCounter:: numInstances 1<br>FlopCpp: Number of constraint blocks: 3<br>FlopCpp: Number of individual constraints: 34<br>FlopCpp: Number of variable blocks: 2<br>FlopCpp: Number of individual variables: 48<br>
FlopCpp: Number of non-zeroes (including rhs): 106<br>FlopCpp: Generation time: 7.922<br>ERROR: XPRSglobal in line 92 error 32 occured<br>Solution of first instance (x)<br>0 0 ERROR: XPRSgetmipsol in line 823 error 32 occured<br>
-6.27744e+066<br>0 1 -6.27744e+066<br>0 2 -6.27744e+066<br>0 3 -6.27744e+066<br>1 0 -6.27744e+066<br>1 1 -6.27744e+066<br>1 2 -6.27744e+066<br>1 3 -6.27744e+066<br>2 0 -6.27744e+066<br>2 1 -6.27744e+066<br>
2 2 -6.27744e+066<br>2 3 -6.27744e+066</div>
<div>...</div></blockquote>
<div> </div>
<div>The documentation of Xpress refers error 32 as: </div>
<div><font face="Frutiger-Roman" size="2"> </font></div>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Subroutine not completed successfully, possibly due to invalid argument.</blockquote>
<div> </div>
<div>Which hasn't helped me much.. Im suspcting that OsiXprSolverInterface is for an older version of XPress ? And that the problem format could have changed ? </div>
<div> </div>
<div>I am cabable of solving simpler non-COIN based problems using Xpress.</div>
<div> </div>
<div>Looking forward to your help!</div>
<div> </div>
<div>/Christian</div>
<div> </div>
<div> </div>
<div><br> </div>
<div> </div><br> </div>