Invalid viewstate error on one PC

[Rod]

We've got a ASP.NET 1.1 application on a Windows 2000 Server. (It has the
latest service pack for .NET 1.1.) I've got a user who, when running the
ASP.NET application gets the following error message:

"Unable to validate data

Exception Details: System.Web.HttpException: Unable to validate data

Stack Trace:
[HttpException (0x80004005): Unable to validate data.]
System.Web.HttpException.Configuration.MachineKey.GetDecodedData(Byte[]
buf, Byte[] modifier, Int32 start,
Int32 length, Int32& dataLength...)

...."

there are other items here about a cluster, but we do not have a clustered
environment.

The strangest thing about all of this is that the problem is localized to
just one PC. If the same user goes to any other PC in-house, and logs on as
herself, she can run the application just fine. And, if anyone goes to her
PC and logs into the ASP.NET application, it does NOT work for them, either.

What could the problem be?

The IIS server is: Windows 2000 Server, with the latest service pack for
2000 and the latest service pack for .NET Framework 1.1.

The user's PC is a Windows XP Professional machine with SP2.

Rod

 

[Alvin Bruney [MVP - ASP.NET]]

copy the machine configuration key from another machine to the problem
machine, or randomly generate a key and add to the problem machine. that
should fix it.

--
Regards,
Alvin Bruney - ASP.NET MVP

[Shameless Author Plug]
The Microsoft Office Web Components Black Book with .NET
Now available @ www.lulu.com/owc, Amazon.com etc