Version 1.2.1 (Nov 8 2010): enhanced error reporting for invalid parameters Version 1.2 (Nov 4 2010): Bug fixed in selective sweep simulation, which is now officially supported. Format for sweep parameter statement: pop_event sweep "selective sweep" 5[pop] 10000[end time] .02[sel_coeff] .5[pos of sel allele (frac)] .4[final freq] Version 1.1 (Feb 7 2006): Functionally identical to 1.0, with improved speed. Version 1.0 (Oct 25 2005): First public version.