The files ts.m and tsml.p can be installed in any directory, but that directory must be included in the set path of MATLAB. If the programs TRAMO and SEATS DOS version (October 2004 or posterior) are not installed in the directories c:/TRAMO and c:/SEATS, you should change: - The environment variable SEATS_DIR pointing to the directory where SEATS is installed; - The MATLAB variables "pathTramo", "pathSeats" and "executable" inside ts.m should point to the appropiate directories. For instance, if you installed TRAMO in c:/MYPROGS/TRAMO and SEATS in c:/MYPROGS/SEATS you should set SEATS_DIR=c:/MYPROGS/SEATS and inside ts.m: pathTramo="c:/MYPROGS/TRAMO"; pathSeats="c:/MYPROGS/SEATS"; executable="c:/MYPROGS/TRAMO/TS.EXE"; Warning: when changing ts.m. be careful, MATLAB is Case Sensitive.