Hi! Platform: Red Hat 3.4.3-9.EL4 GCC: 3.4.3 version C++ Boost: 1.34.0,1.35.0,1.36.0,1.38.0 (all were tried) But it is occur that the same error: ./../src/alps/alea/simplebinning.h:602: error: `it' undeclared (first use this function) ./../src/alps/alea/simplebinning.h:602: error: (Each undeclared identifier is reported only once for each function it appears in.) make[2]: *** [observableset.lo] Error 1 make[2]: Leaving directory `/home/glz/ALPSSource/alps-1.3.4/lib/alps' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/glz/ALPSSource/alps-1.3.4/lib' make: *** [all-recursive] Error 1 please help me! Thanks a lot!