Dear developers I already compiled the background (buildtools, MonetDB, and clients). I also compiled M4 (only after removing the dependencies in Mapi.h). During M5 compilation I got the following error: -Wl,/ufs/goncalve/scratch/MonetDB/monetdb5/build/src/mal/.libs -Wl,--rpath -Wl,/ufs/goncalve/scratch/MonetDB/MonetDB/lib -Wl,--rpath -Wl,/ufs/goncalve/scratch/MonetDB/monetdb5/lib -Wl,--rpath -Wl,/ufs/goncalve/scratch/MonetDB/MonetDB/lib ../../mal/.libs/libmal.so -L/ufs/goncalve/scratch/MonetDB/MonetDB/lib /ufs/goncalve/scratch/MonetDB/MonetDB/lib/libbat.so /ufs/goncalve/scratch/MonetDB/MonetDB/lib/libstream.so -lMapi -lz -lbz2 -lpthread -ldl -lcrypt -m64 -Wl,-soname -Wl,lib_algebraExtensions.so.0 -o .libs/lib_algebraExtensions.so.0.0.0 /usr/bin/ld: cannot find -lMapi collect2: ld returned 1 exit status make[7]: *** [lib_algebraExtensions.la] Error 1 make[7]: Leaving directory `/net/amelia/export/scratch1/goncalve/MonetDB/monetdb5/build/src/modules/mal' make[6]: *** [all] Error 2 I can not remove all the dependencies in -lMapi. What you suggest to resolve this problem? Regards, Romulo