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ITsVISTA KB-Link: KB974905

You receive error code C00D11B1 when you try to play an MBR file or a live stream that contains more than 32 media streams in Windows Media Player on a computer that is running Windows Vista

You have a multiple bit rate (MBR) file or a live stream that contains more than 32 media streams. You try to play the MBR file or the live stream in Windows Media Player on a computer that is running Windows Vista. However, Windows Media Player cannot play the MBR file or the live stream. Additionally, you receive error code C00D11B1.

Note: This problem also occurs when you use Windows Media Player on a computer that is running Windows XP.

There is a download that resolves this issue. See Hotfixes for details.
32-bit Download: Contact Microsoft
64-Bit Download: Contact Microsoft

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB974905.

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