Word Web App cannot open this document due to an unknown error. If the problem persists, try opening the file in Microsoft Word.
Resolution: 1.On the Central Administration Web site, in Application Management, click Manage web applications. 2.On the Web Applications Management page, select the Web applications that the site collection belongs to, and then clickService Connections. 3.On the Configure Service Application Associations page, verify that the following kinds of service application proxies are associated with the Web application: ◦Word Viewing service application proxy Word 97-2003 Document Scanning To provide added security when loading Word 97-2003 documents, the Word Viewing Service Application performs extra checks before those documents are opened. These checks have an impact on overall server performance. Only disable this setting if you trust ALL documents loaded by this instance of the service. Disable Word 97-2003 document scanning? Yes No select NO from the radio button