Miscellaneous

Besides some bug fixes we made many minor improvements. The most important ones are listed here.

• The output for the output levels SubProblem and LinearProgram is formatted in a nicer way.
• Besides those Cplex parameters that could be directly controlled by ABACUS functions, it is now possible to get or to modify any Cplex 4.0 parameter with the functions:

        int CPLEXIF::CPXgetdblparam(int whichParam, double *value);
        int CPLEXIF::CPXsetdblparam(int whichParam, double value);
        int CPLEXIF::CPXgetintparam(int whichParam, int *value);
        int CPLEXIF::CPXsetintparam(int whichParam, int value);

• If a linear program is solved with the barrier method, then usually a cross over to an optimal basic solution is performed. The value of a variable in the optimal solution of the barrier method before the cross over can be obtained with the function double barXVal(int i). If this ``pre-cross over'' solution is available, can be checked with the function SOLSTAT barXValStatus() const.
• The minimal required violation of a constraint or variable in a pool separation or pool pricing, respectively, can be specified as a parameter of the functions ABA_SUB::constraintPoolSeparation and ABA_SUB::variablePoolSeparation. The minimal violation is also a parameter of the function ABA_POOL::separate and of redefinitions of this function in derived classes.