SQL Server Performance

Error Message

Discussion in 'SQL Server 2005 Reporting Services' started by semje, Nov 6, 2009.

  1. semje Member

    Hi everyone,
    Just wondering if anyone has seen this message and could tell me what it means. It is happening when I'm trying to upload files or choosing a shared data source.
    Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
  2. melvinlusk Member

    What is generating this message? Is this a homegrown application, Reporting Services, etc?

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