Starting GSAS-II

This is done in different ways, depending on your OS and how GSAS-II is installed.

One common way is start a console window, set the current directory to the location of GSAS-II  and then enter:




This will work if the default python is as described in the GSAS-II Wiki pages you found when downloading GSAS-II, otherwise you may have to enter the correct path for that version of python.


On Windows, there is a GSASII.bat file in the main GSASII directory you can use as a shortcut. Put a shortcut to it someplace convenient (maybe your Desktop?)


You should see three windows, two of which are empty. One, in the upper right, is labeled GSASII data tree, the second, immediately under the first is labeled GSAS-II data display and the third on the left is labeled GSAS-II Plots. These windows may be moved anywhere on the screen. On Linux and Windows a menu bar appears at the top of  the data tree and data display windows; on a Mac these menus will appear in the system menu bar location (usually at the screen top) depending on which GSAS-II window has the focus. On my Windows machine the screen looked like



 The project file contains all data and results related to the project you are working on. (Exception: image files are not stored in the project; to save space only the file name is saved.) The console window displays a banner and some information about the version of python and the packages used by GSAS-II. This console window (here in the lower left) will display important information as data processing by GSAS-II proceeds. You may wish to cut-and-paste parts of this window to another place if desired.



We suggest that you change the properties of this window to (in Windows: Properties/Layout) to have 9999 for the height and 150 for the width and to allow “QuickEdit Mode” (if available) for easy cut/paste operation. You can perhaps also change the font, font size, font color and background color if desired.