Event ID 202 — BITS Client Connectivity

Event ID 202 — BITS Client Connectivity

Updated: January 7, 2009

Applies To: Windows Server 2008 R2

In order for the BITS client to successfully complete files transfers, the client must be able to connect to a BITS server that is available on the network.

Event Details

Product: Windows Operating System
ID: 202
Source: Microsoft-Windows-Bits-Client
Version: 6.1
Message: While transferring %1, BITS encountered error %7 using %6 as the HTTP proxy server. The Web server or proxy server does not support an HTTP feature required by BITS. This problem can be corrected only by the administrator of the Web server or proxy server. Details: {job: %1}, {owner: %2}, {jobId: %3}, {url: %4}, {xferId: %5}, {proxyServer: %6}, {hr: %7}, {urlContentLength: %8}, {urlHttpVersion: %9}, {urlRange: %10}.

Ensure that the HTTP server meets BITS requirements

To resolve this issue, ensure that the HTTP server meets BITS requirements.

BITS supports HTTP and HTTPS downloads and uploads and requires that the server supports the HTTP/1.1 protocol. For downloads, the HTTP server’s Head method must return the file size and its Get method must support the Content-Range and Content-Length headers. As a result, BITS transfers only static file content and generates an error if you try to transfer dynamic content, unless the ASP, ISAPI, or CGI script supports the Content-Range and Content-Length headers.

BITS can use an HTTP/1.0 server as long as it meets the Head and Get method requirements.

To support downloading ranges of a file, the server must support the following requirements:

  • Allow MIME headers to include the standard Content-Range and Content-Type headers, plus a maximum of 180 bytes of other headers.
  • Allow a maximum of two CR/LFs between the HTTP headers and the first boundary string.


Confirm that the proxy servers support HTTP 1.1 RANGE requests. If RANGE requests are enabled, BITS will automatically retry the job.



Related Management Information

BITS Client Connectivity

BITS Infrastructure


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