thanks for the prompt advise, timothy. I tried with the debian option, but i receive the following error message, " [-1] error: File /home/vyankatesh/RPM/SOURCES/SerialPort-&1.&20.0.tar.bz2: No such file or directory. Package.MakePackage.440". My program is simple; open serial port and transmit the character input by the user. It works fine when run through the Gambas environment and tested the working by connecting it to a PC running Hyper Terminal (on WIn XP). Do the files to be used for installation package need to be kept is any particular folder, I wonder? Thanks in advance. Regards.