This could be a database permission issue. From v1.5 to 1.6 a new database field was added and we have had a few users who did not have the appropriate database permissions so the new field could not be generated while updating, causing the database queries to fail and show zero entries even though the data is still there.
Make sure you have the ability to ALTER your Gravity Forms' database tables. Then you can try the following:
1. If you have uninstalled v1.6.2x, reinstall it.
2. Turn on debug mode so errors are displayed (wp_debug in wp-config.php).
3. Force the database update by going to the settings page (Forms->Settings) and adding "&setup" to the query string, so that the page looks something like "...wp-admin/admin.php?page=gf_settings&setup"
If there are any errors as far as updating the database you should see them. Some have had simply forcing the database update create the database field and fix their issue.
If there are no errors and this doesn't fix your issue, another thing to check would be your php memory; it could need to be increased since there are a lot of new features in 1.6.2x.
Let me know if you have questions.
Posted 3 years ago on Thursday February 16, 2012 | Permalink