I am using Feeds and Commerce Feeds to import product lists into my Drupal Commerce store. I'm finding I have to keep the csv files really small for the import to succeed? As soon as the file is too big (the exact threshold size does not seem to be consistent) the system generates a 403 error as follows:
An AJAX HTTP error occurred. HTTP Result Code: 403 Debugging information follows. Path: /batch?id=260&op=do StatusText: Forbidden ResponseText: Access denied
The file that resulted in this error was 577kB.
The only way around the problem is to have multiple csv files. These all have to be maintained and updated individually, which is very inefficient.
What can I do to improve this state of affairs?