Not sure what is happening, but I tried to run the following sample code from the article: import extensions; import system'routines; import extensions'routines; public program() { var list := new Range(1,5).selectBy:(n => randomGenerator.nextInt(100)).toArray(); console.printLine("sort(",list,")=",list.orderBy:(p,n => p < n)) } and elena64-cli does not like it: elena64-cli.exe random.l ELENA Command-line compiler 6.0.565 (C)2005-2024 by Aleksey Rakov Project: random, Platform: Win_x64,...