Hi Nicolas,
I have been experimenting with generating products from files from the contents of a folder.
I can only succeed if I enter the path to an existing folder that is not there ... very strange. To clarify the example importsuccess.jpg, the folder /jpegs/ is in my domain name root directory, but it takes files out of my joomla directory and creates products from those. I had to purchase them back from myself and put them back - they were just text files but still a little worrying to just leave them out. It would be a good ideato always have the remove files radio button selected by default by the way.
When I give the correct path, regardless of where the folder is in the hierarchy I get the error message in the attached file called importfail.jg.
I have tried many configurations, both placing the source folder for my images at higher places in the hierarchy (thats how I accidentally found out how it can work) and changing the permissions on folders from 777 to 755 and back again.
My files are 3 to a little over 10 mb jpegs.