We are using Docsaway and within the last week or so, select items being sent with Docsaway are producing an error within Odoo. When trying to send a document we get the following error:

DOCSAWAY ERROR : 005 File containing the data was not found, check property values being submitted are correct.

Docsaway shows that nothing is making it to them and it is in issue from within Odoo. We are able to click on the invoice being sent and save/open the pdf without issue. Checking the log files only shows the same error message and no other details. This is not consistent as many items are being sent, but about 1 per day fails and refuses to send and produces the same error. 

Enterprise V10, Ubuntu Server 16.04