When failing to post to Xero, Weighsoft will display the message it receives back from Xero in the Posting Ledger, accessible by clicking the Failed Items text in the same row as the run in question.
There can be several messages displayed here, but this article will focus on the "Validation Error" message.
One reason for this message to appear is if the invoice has already made it to Xero, but too many invoices were a part of that run, so Weighsoft didn't get to update the posting status of some of the affected invoices. Subsequent attempts to post will display this Validation error, which is returned because these invoices are already in Xero, despite being marked in Weighsoft as not posted.
To resolve this issue, you will first need to check Xero for these invoices. If they are there, then you will be able to continue with changing these invoices to be marked as posted within Weighsoft, which can be done using the following steps:
Hover Administration
Click Admin Functions
Click Posting
Find the two boxes beneath the heading Change Posted State
Enter the Invoice Number as well as the Company into these boxes
Click Change
This will set the Invoice you enter from 'not posted' to 'posted', meaning that you will be able to continue postings without these invoices causing errors.
If the offending invoices are NOT in Xero, please raise a case with the support team.