Hi Michael, Pharo has closures already integrated and there is a prebuild image for Squeak too: at http://www.squeakvm.org/win32/release/?C=M;O=D you will find Squeak-3.10.2-Closures.zip There you will also find a prebuild image for the new trunk development model Squeak has (see squeak-dev). This image should have the closure changes too. Maybe you'll have a look in the changesorter in one of the which may still have the change file for the closure stuff. Otherwise ask Andreas since has has built the image. Note that you need a newer Squeak VM with closure support for Pharo and these specific closure aware Squeak releases. Have fun Torsten -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01