I've uploaded files with a few MB with no issue.

Are you just uploading or processing while uploading? That takes more time. Depending on your data, it can timeout easily.

The ideal sequence is:

1) upload binary to a temp table. Send feedback to user.

2) call a timer to process the file.

3) after the file was successfully processed, delete/archive file.

3) Mail (or somehow notify logged user) to inform of that.

Hi,

Adding to what Nuno wrote:

For a better understanding why you get an time out read the section application request timeout

In https://success.outsystems.com/Support/Enterprise_Customers/Maintenance_and_Operations/Timeouts_Under_the_Hood

Also read

https://www.outsystems.com/forums/discussion/47314/bulk-upload-of-excel-data-to-outsystems-database/

And there is a Forge component to that shows you how to read large files

https://www.outsystems.com/forge/component-overview/6111/large-file-data-import-sample

Regards,

Daniel