Parameters in Reporting Services

[Joško Šugar]

When I create a report without parameters it works fine. In preview
(Visual Studio 2005) and when I deploy it.
When I add parameters, in preview it works fine, but when deployed I get
this error:
Failed to load expression host assembly. Details: ? (rsProcessingEr ror)
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I didn't make complicated report with complex parameters. It was
something like this:

http://www32.brinkster.com/srisamp/sqlArticles/article_39.htm

Anybody had similar problem?