The Windows file is an executable installation file. Double click on the icon to start the installation. You will be guided through the installation. Run the program by double clicking on the structure icon.

Unix/Linux/Mac OS X

On a Linux, Mac or Solaris system, put the downloaded file into a suitable directory. Open up a terminal window and move to the appropriate directory using the unix command 'cd'. Next, unzip the file ( 'gzip -dc filename.tar.gz' followed by 'tar xvf filename.tar'), where filename is the name of the downloaded file. [On a Mac, the unzipping steps may be done automatically when you download the program or by clicking on the filename.] Move into the 'frontend' directory ('cd frontend'). Type './install'. You can run structure by typing './structure' in the 'frontend' directory.

Notes:

1. In order to install the frontend you will need the Java Runtime Environment (JRE Version >1.5.0). This can be downloaded for free from http://www.java.com/downloads/
2. If you have trouble installing or running the program, try installing and running from root (i.e., type 'sudo ./install' and 'sudo ./structure'). You will need to use the root password.

Package without front end

The downloaded files are compressed in zip files; uncompress them using "unzip [filename]" on Unix/Linux system or using winzip on windows. The zip files contain an executable and parameter files, as well as a sample data file "testdata1". The program is set up to run on these data immediately (just type "./structure" to start the program).