The path for every new instance of the shell starts in my user directory (C:\Users\user). Within this directory or rather drive (in this case C:) I can't use the cd command as I'm used to - it only echoes the specified directory. As soon as I change the directory to a parent-directory I can execute "cd D:" and it changes to the drive. But this behavious doesn't appear consistently in all instances of the shell. Sometimes I have to go to C: to change it. I'm quite sure I'm not using the command in the wrong way, since it's what I'm used to do to start grails.