Service 新贵服务提供'；chdir：未找到命令'；错误

我已经创建了一个名为watch_folder.conf的upstart conf脚本，我已经在一些ubuntu安装中成功地使用了它，但由于某些原因，我从以下代码中得到了一个错误：

#/etc/init/watch_folder.conf

description "watch folder service"
author      "Jonathan Topf"

start on startup

stop on shutdown

respawn
respawn limit 99 5


script
        chdir /home/jon/Dropbox/Render\ Farm\ 1/appleseed/bin
        exec /usr/bin/python ./watchfolder.py  ../../data/
        echo "watch_folder started"
end script

如果我查看/var/log/upstart/watch_folder.log内部，我会看到以下内容

/proc/self/fd/9: line 2: chdir: command not found
/proc/self/fd/9: line 2: chdir: command not found
/proc/self/fd/9: line 2: chdir: command not found
/proc/self/fd/9: line 2: chdir: command not found
/proc/self/fd/9: line 2: chdir: command not found
/proc/self/fd/9: line 2: chdir: command not found
...

---

有人知道是什么导致了这个错误吗？这让我很困惑

我似乎没有误解upstart conf文件的结构，比如

script

，

chdir

是一个节，所以不应该出现在其中

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