When doing an export on a form with many entries on a server with a low memory limit, often times you will receive a partial output with an out of memory error or a blank csv.
The solution I often see suggested in the forums is to increase the memory limit. Unfortunantly that is not possible in all circumstances, or results in increased charges from the hosting company.
I have found that changing $page_size in export.php from the default '200' to a lower value usually resolves this issue. I was hoping instead of having this value hardcoded in the script it could be changed to an advanced configuration item.
Thanks!