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Intermittent failure of file upload

We're running Fogbugz on Windows Server 2003.

Pretty frequently (but intermittently), when we attach a file to a case, it appears as a link in the case, but clicking on that link results in an error screen:

File:     /download.asp
Line:     95
Error:     File could not be opened.
Browser:     Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040614 Firefox/0.8
Number:     0x800A0BBA
Category:     ADODB.Stream
Column:     -1
QueryString:     ixBugEvent=4132&sFileName=[redacted]&sFile=yes
URL:     /download.asp
Content Length:     0
Local Addr:     [redacted]
Remote Addr:     [redacted]
Time:     6/29/2004 12:46:50 PM

Normally, if we attach the file again, the new attachment works fine.

Jim Causey
Tuesday, June 29, 2004

That's a 2003-specific issue, please see this article:

Fog Creek Software
Tuesday, June 29, 2004

It's intermittent because IIS6 freely switches the user account it uses for anon authentication (i.e. uses the one you specify sometimes, and other times not, which is when the upload fails).

Fog Creek Software
Tuesday, June 29, 2004

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