If the first attempt fails to upload, try uploading one more time.
Restart the data services on the computer you're uploading data from.
Remove any large attached files that are increasing the upload size.

If the company successfully uploads, continue to the next section, if it doesn't, follow the 'check proxy servers, firewall and antivirus' section.
Disconnect all connected services then try uploading again.
If the company still has an issue uploading, get in touch with Sage support.
Follow the steps in our Proxy Servers, Firewall and Antivirus articles, to make sure they aren't blocking the upload.
If you need help with these steps, contact your local IT support.
Upload the company data using a different Sage account. If you don't have one, create a Sage account.