To compile the code, one has to use the GNU compiler, because the GNU STL extension for the hash_set is used. In the make.sh (the script file one has to call to compile), one has to adjust the pathes to CPLEX. Additionally, one has to set the softlink strstream.h -> /usr/include/c++/3.3.5/backward/strstream (or whereever the file "strstream" is located) in the feaspump root directory. Tobias Achterberg , 26/10/2005