To clarify my question: Currently I launch ABCL using a bat file that looks as follows: "C:\Windows\sysWOW64\java.exe" -cp "c:\mv-program-files\abcl-bin-1.4.0";"c:\mv-program-files\abcl-bin-1.4.0\abcl.jar" org.armedbear.lisp.Main %1 %2 %3 %4 %5 %6 %7 %8 %9 I also have one setup in slime that launches it as follows: "C:/Windows/SysWOW64/java.exe" -jar "c:/mv-program-files/abcl-bin-1.4.0/abcl.jar" I did not add anything to PATH or any other environment variables. Is there something that I should? On Fri, Dec 30, 2016 at 11:14 AM Mirko Vukovic <mirko.vukovic@gmail.com> wrote: Hello, This is a follow-up to my earlier post on stack overflow. That problem is still not solved and here is one question. On the user documentation page I found the instruction to "add abcl.jar to your class path for ABCL projects" How do I do that? Thanks, Mirko