Ouch. I was recently working on a project that started with SQL Server 2008 R2 Standard Edition and eventually ended up with SQL Server 2012 Web Edition in a hosted environment. When I attempted to stand up a staging environment on the 2012 Web Edition instance I received the following error.
The feature: "Shared dataset" is not supported in this edition of Reporting Services. (rsOperationNotSupported)
I came to find out that the "Shared component library" feature of SSRS is only available in Standard Edition and up. I have to admit that before we moved from 2008 R2 to 2012 I reviewed the Features Supported by the Editions of SQL Server 2012 MSDN page and didn't realize that the Shared Dataset feature was a subset of the Shared component library feature. It appears that this feature is also sometimes referred to as the "Report Part Gallery" as can be seen on the Programming Features for Reporting Services Editions page, also on MSDN.
