ODK Error When Exporting Data

[iamnarendrasingh]

please go through with below link

Unknown Error: "Error: Problem persisting data or accessing data

Hi all, We have a survey going live at the moment, with data being uploaded on a daily basis. We are using a server a google app engine deployment of ODK Aggregate version 1.4.3. It was my intention to update this to the latest version of Aggregate once this fieldwork was completed. To date, there has been no issues, but starting today when viewing data on the "Submission" page of our appspot page for this server, I have been getting the below error. The error is repetitive, but each time…