Using wrong index.<br><br>This:<br>      OsiSolverInterface::deleteColNames(firstDelete,num2-firstDelete);<br>should be this:<br>      OsiSolverInterface::deleteColNames(indices[firstDelete],num2-firstDelete);<br><br><br><a href="https://projects.coin-or.org/Osi/ticket/82#preview">https://projects.coin-or.org/Osi/ticket/82#preview</a><br>