The Standalone Designers from different releases serialize the report with updated standards, which causes the issue when yo try to preview XML report definition created with Q3 2013 with the Standalone Designer of Q1 2013. Upgrading report definitions happens automatically, but downgrading is not supported.
We can suggest you to create Visual Studio reports library, which can be up/downgraded using the Upgrade Wizard
, and when needed you can import the generated DLL
with the corresponding version of the Standalone Designer.
I hope this information helps you.
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