> thank you very much I have some more question
>
> there is a problem I got no solution and i dont knew why.
>
> Could you tell me in which function(s) is the problem?
>
> the contraints I did as you told me. I change only GLP_UP; FX
>
>
> startModelBuilding(nbRows : Int, nbCols : Int){
> lp = GLPK.glp_create_prob()
> GLPK.glp_add_cols(lp, nbCols)
> }
>
> def setBounds(colId : Int, low : Double, up : Double) {
> GLPK.glp_set_col_bnds(lp, colId+1, GLPKConstants.GLP_DB, low, up)
> }
>
> def setUnboundUpperBound(colId : Int) {
> GLPK.glp_set_col_bnds(lp, colId+1, GLPKConstants.GLP_LO, 0,1000)
> }
>
> def addObjective(coef : Array[Double], col : Array[Int], minMode :
> Boolean = true) {
> GLPK.glp_set_obj_name(lp, "objective");
> GLPK.glp_set_obj_dir(lp, if (minMode) GLPKConstants.GLP_MIN else
> GLPKConstants.GLP_MAX)
> for (i <- 0 to col.size-1) {
> GLPK.glp_set_obj_coef(lp, i,coef(i))
> }
> }
>
> def solveModel() : Int = {
> println("solveModel");
> val iocp = new glp_iocp();
> GLPK.glp_init_iocp(iocp);
> iocp.setPresolve(
> GLPKConstants.GLP_ON);
> val ret = GLPK.glp_intopt(lp, iocp);
>
> if (ret == 0) {
> sol = Array.tabulate(nbCols)(col => GLPK.glp_mip_col_val(lp,col
> +1))
> objectiveValue = GLPK.glp_mip_obj_val(lp)
>
> ret
> } else {
> System.out.println("The problem could not be solved");
> ret