An emphasis on finding hidden feasible solutions has proven particularly effective for this problem so this example makes that selection by setting the MIPEmphasis parameter to 4.

You can see the entire example online in the standard distribution of ILOG CPLEX at yourCPLEXinstallation/examples/src/etsp.cpp. Implementations of the same model, using the same features of ILOG CPLEX, are available as Etsp.java, Etsp.cs, and Etsp.vb as well.