# File bin/el4r-instance, line 857
    def el4r_raise_lisp_error
      msg = el4r_lisp_eval("(prin1-to-string el4r-last-error-desc)")
      @el_backtrace << el4r_lisp_eval("(prin1-to-string el4r-error-lisp-expression)")
      raise(ELError, "Error in lisp code.:#{msg}\n#{@el_backtrace.join("\n")}")
    end