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From Konstantin Preißer <>
Subject RE: ISAPI errors 87 when disabling IIS 7.0's response buffering
Date Thu, 23 Feb 2012 17:35:09 GMT
Hello Rainer,

> -----Original Message-----
> From: Rainer Jung []
> Sent: Monday, February 20, 2012 7:48 PM
> I don't really know, but 1220 is ERROR_CONNECTION_INVALID, which is
> closer to what you expected. One of the parameters passed to
> WriteClient
> and also in the vector write case is actually the connection ID so it
> could be that a unusable client connection could also return "87".
> Unfortunately MSDN doesn't have any useful information.
> Maybe Mladen or Tim know more about it.
> Regards,
> Rainer

Thank you for your reply.

I see that MSDN says about Winsock error 87:


One or more parameters are invalid.
    An application used a Windows Sockets function which directly maps to a Windows function.
The Windows function is indicating a problem with one or more parameters. Note that this error
is returned by the operating system, so the error number may change in future releases of

So I guess the 87 errors correspond to the 1229 errors (when the connection is invalid).


Konstantin Preißer

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