Hi, in footnote 1 of the package guide pkgbook.pdf (March 2018 version), p.38: http://sourceforge.net/p/gretl/git/ci/master/tree/gui2/ Obviously due to change from gui2 to gui. Maybe somewhere else as well, web page? BTW, here on Windows by default an outdated version of pkgbook.pdf gets picked: The older one lives in c:\users\<name>\AppData\Roaming\gretl\doc, while the recent one is in c:\program files\gretl\doc. (As always, I'm very lazy when installing new snapshots and do not really remove the previous versions.) thanks, sven