Hi Cai, I hope you're doing well. I thought I'd mention to you that I just installed edpdb on a couple of linux machines. (I still use the program all the time, I can't do anything without it!) The machines are running Fedora Core 6. The executable I downloaded from your web page worked but I had to install the following libraries: compat-readline43-4.3-3.i386.rpm compat-libf2c-32-3.2.3-47.fc4.i386.rpm There are more recent versions of the libf2c library but they have some compatibility problem with fedora core 6. But edpdb works with these versions. I hope this will help somebody else that runs into the same problem. Cheers, Andy Andrew Hausrath hausrath@email.arizona.edu Dept . of Biochemistry and Molecular Biophysics, University of Arizona