環境： LyX 2.0 @ Win 8.0
錯誤訊息：
文件類別無法使用
The selected document class
article
requires external files that are not available.
The document class can still be used, but the
document acannot be compiled until the following
prerequisites are installed:
article.cls
See section 3.1.2.2(Class Availability) of the
User's Guide for more information.
但是檔案的確安裝進去了 LyX 設定的路徑也是對的
請問有人知道問題出在哪嗎?