Exporting large Report Designer Reports to Excel fails
Symptoms
When attempting to export large reports to excel (several thousand records), the browser crashes or doesn't respond.
Resolution
There is a limitation on the number of rows that can be exported to excel using browsers. For the volume of data, an SQL option should be implemented. Excel has native functionality to connect with a SQL server.
Please also make sure there is enough free space on your local disk, as the export creates a temporary file. The larger the report, the larger the temporary file (it can be several MB).