执行tocmd_local -d . 报错，显示没有workspace.html

[i5ting]

嗨，我看了您的项目遇到如下问题。
我安装了tocmd，
执行
tocmd_local -f a.md
生成preview文件夹。

但是执行tocmd_local -d . 报错，显示没有workspace.html
osx10111-e0accb813994:lab garvin$ sudo tocmd_local -d .
"."
hi_dir src path = /Users/garvin/Documents/lab
hi_dir desc path = /Users/garvin/Documents/lab/preview
"start building......"
"src_dir = /Users/garvin/Documents/lab"
"dest_dir = /Users/garvin/Documents/lab/preview"
"build = /Users/garvin/Documents/lab/preview/a.html"
The file /Users/garvin/Documents/lab/preview/workspace.html does not exist.
"0.4.1"

请问要如何解决呢，谢谢