Error when starting ReportBuilder: “Unable to install this application because an application with the same identity is already installed.”

Problem is caused when you run Report Builder from multiple SharePoint servers. RB is cached with setting from previous server and cannot run with this settings on new one.

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“The definition of this report is not valid or supported by this version of Reporting Services.”

Sometimes reports stop working after uploading newer report definition (RDL) – but definition is 100% proper?

Example of error message:

The definition of this report is not valid or supported by this version of Reporting Services. The report definition may have been created with a later version of Reporting Services, or contain content that is not well-formed or not valid based on Reporting Services schemas. Details: '.', hexadecimal value 0x00, is an invalid character. Line 4632, position 10.

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