Whenever I use the “Import” function in Web Administration to import a new data file, I get this message and then I lose all my formatting that I did previously.
To prevent this from happening, you will have to add a line of code in the opadmin.js file on the server.
On the server locate the OPAdmin.js file in the opweb folder. Edit the .js file with Notepad and insert this line in the indicated location:
document.write('<param name="AllowImportDataOverwrite" value="1">');
Save the file and exit Notepad.
If the issue persists, please contact Support.