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Error: 'Attachment could not be posted. API Http error.'
Error: 'Attachment could not be posted. API Http error.'

How to clear the error 'Attachment could not be posted. API Http error.'

Emma Carroll avatar
Written by Emma Carroll
Updated over a week ago


The user is receiving the below error message when publishing an invoice.

Attachment could not be posted. API Http error.

Applies To

  • Sage Accounting/Sage Business Cloud Accounting users uploading invoices.


If you are seeing this error after publishing an invoice, it would be due to limitations within Sage relating to the file size limit that can be attached externally. Sage will only allow you to attach files that are no larger than 2.5MB.


To clear this error, please do the following:

  1. Save the invoice image to your PC; click to view the invoice from your Inbox, and select the PDF download button on the bottom right corner of that screen.

  2. Manually attach it to the transaction in Sage.

Additional Information

  • Please note that this error does not mean that the extracted invoice data has not published to Sage, it only relates to the invoice image attachment.

Last edited:

Apr 27, 2023, 07:00 AM

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