New in Version 3.0

Here are the additions for Version 3.0:

• An interface to the LP solver OSL is now included. Be forewarned that this interface is a beta version. Although it seems to perform properly, it currently causes the branch and bound tree to grow significantly over what would be experienced with CPLEX. This anomaly has yet to be explained. Use with caution.

• A few small bugs were fixed.

• Added support for ccmalloc to the makefile.

• Added support for starting up the drawgraph process on a specific machine.

• Added support for new distance types in the VRP application.

• Added ROOT_NODE_ONLY compiler directive which directs the solver to process only the root node of the branch and bound tree. This is useful for research purposes when one wants to test the change in lower bound in the root node after the addition of some cutting plane procedures.

• Added ``deletable'' field to the data structure for cuts. This field allows the user to specify that certain cuts should never be removed after being added. It is set to TRUE by default which maintains the legacy behavior.

• Added support for compiling with MS Visual Studio 6.0.