Unfortunately there comes up a new problem. I have tried the original data downloaded, installed everything, and startet the build process. One remark: I did it on two environments, one has installed Tcl/Tk, the other has no installation, but the result was the same (protocol from machine without Tcl/Tk). >>>>> snip >>>>> .. .. >>> copy Tcl/bin/tcl83.dll to I:\BuildOneClickFromNet\BuildingOneClickInstaller\extract\rubyinstaller\installer-win\stable/./Tcl/bin/tcl83.d ll >>> copy Tcl/bin/msvcrt.dll to I:\BuildOneClickFromNet\BuildingOneClickInstaller\extract\rubyinstaller\installer-win\stable/./Tcl/bin/msvcrt. dll cd I:/BuildOneClickFromNet/BuildingOneClickInstaller/extract/rubyinstaller/installer-win/stable/download/ruby-1.8 ..2 cd ext cd tk I:\BuildOneClickFromNet\BuildingOneClickInstaller\extract\rubyinstaller\installer-win\stable\bin\ruby extconf.rb ../commands.rb:222:in `run': Command failed: (RuntimeError) from ./commands.rb:190:in `each' from ./commands.rb:190:in `run' from ./commands.rb:80:in `tcltk' from builder.rb:157 from builder.rb:151:in `instance_eval' from ./package.rb:131:in `instance_eval' from ./package.rb:131:in `initialize' from builder.rb:151:in `new' from builder.rb:151 NMAKE : fatal error U1077: 'ruby.exe': Rkgabe-Code '0x1' Stop. >>>>> snap >>>>> Is there a problem in the build process or in my environment?. Best regards, Wolfgang -- Wolfgang NáÅasi-Donner wonado / donnerweb.de