What is the problem? Please be detailed.
When exporting data using ODK BriefCase, I obtain empty csv files. Export Status: "Exported 0 submissions". I first pulled data using same ODK BriefCase with success. I verified ODK Briefcase storage, form and instances are present.
What ODK tool and version are you using? And on what device and operating system version?
ODK BriefCase v1.11.0
For the latest version there should be a briefcase log file. Can you try to locate it in your laptop.
Get the latest program here, place it in a new / empty directory. Then launch it. You should see a new file there. See the screenshot below
If you can't, try launching the program from the command line, then attach the screenshot.
@Raoul, if you don't mind sharing your data with me, can you please zip up the ODK Storage folder and email it to me (yanokwa@nafundi.com) so I can see if I can reproduce this problem?