An update of SOCPROG, SOCPROG2.5 (both compiled and uncompiled versions), is available at *http://myweb.dal.ca/hwhitehe/social.htm <http://myweb.dal.ca/hwhitehe/social.htm>*. SOCPROG is a series of MATLAB programs written by Hal Whitehead for analyzing data on the social structure, population structure and movements of identified individuals. SOCPROG2.5 includes a number of bug fixes and enhancements since SOCPROG2.4. The most important changes are: 1. Addressing compatibility issues with the change from MATLAB7 to MATLAB8. 2. Compiled version of SOCPROG2.5 should work on Windows 7 or Windows 8. 3. Social association can now be defined using locational data. 4. Export to GraphML format. 5. Output of estimated standard errors of association indices. 6. Adjustment of association indices for gregariousness (Godde et al. Animal Behaviour 2013). 7. Estimation of mortality using social relationship data (Whitehead and Gero Methods in Ecology and Evolution 2013). I hope SOCPROG2.5 is useful. Let me know about any problems that remain, or have been introduced. Thanks Hal Hal Whitehead (*hwhitehe@dal.ca <hwhitehe@dal.ca>*) Biology Department, Dalhousie University