I have authored a number of surveys. Both I and field workers are able to use and submit data. But one surveyor can not submit data from one of the surveys (Gemmamyces_monitoring_survey_v2), the other surveys work fine. He gets error code 400 Invalid URL whether he is trying to submit from the Outbox or immediately. The type of his connection to the internet does not matter (cell or good WiFi). Strangely, on the Download Surveys page, he has a down arrow instead of the circular arrow (which makes it appear that he has not downloaded the survey, although he has). The date and time listed under "Updated 4/28/16 8:14 AM" is the same as everybody else's. We tried Fix Database under Settings, but it did not resolve the issue. I really need to get that data to upload. Is there anyway to recover it?