Troubleshooting : System Architect XT error messages and problems : HTTP 404 not found while opening SAXT webpage
  
HTTP 404 not found while opening SAXT webpage
Possible causes
The Default.aspx file is not listed as one of the default content pages in Microsoft Internet Information Services (IIS)
To verify whether the Default.aspx file is listed as a default content page in IIS:
1 In Microsoft IIS Manager, expand the local computer name > Web Sites > Default Web Site.
2 Right-click SAXT, and then click Properties.
3 Click the Documents tab.
4 Locate the Default.aspx file. If the file is not found, click Add and then type:
Default.aspx
The ASP.NET file is listed as a prohibited web service extension
If the Default.aspx file is listed on the Documents page, the ASP.NET file might be listed as a prohibited web service extension in Microsoft IIS 6.0. To allow ASP.NET web extensions, do this:
1 In Microsoft IIS Manager, expand the local computer name.
2 Click Web Service Extensions or ISAPI and CGI Restrictions depending your version of IIS.
3 Select ASP.NET v2.0.50727 and click Allow.
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System Architect XT error messages and problems