Out of Memory - Clustered Chart rendering issue with number of columns in 2008R2, not in 2008

Hi pikey,

The issue can be caused  by the chart report is too large, please reference to the article below :

Redesign the report queries. You can reduce memory consumption by   redesigning the report queries in the following ways:   

• Return less data in the report queries.
• Use a better restriction on the WHERE clause of the report queries.
• Move complex aggregations to the data source.

You can also export the report to a different format. You can reduce memory consumption by using a different format to display the report.     

More details information, please reference to article below:
http://ift.tt/1y2Z2au