I released a new version of the rundo and rundolines programs to integrate the Stata statistical package with an external text editor. Version 4 of the programs supports Stata 12, released in July 2011, as well as previous versions of Stata. Users who upgrade from an older version of Stata to Stata 12 must install the new rundo and rundolines programs. The old programs are not compatible with Stata 12 because some keyboard shortcuts in Stata have changed. Users of Stata 8 to 11 can continue to use version 3.1 of rundo and rundolines.