Known issue: Invoice not updated to ledger when net value discount is applied

This issue occurs in v30.0 and above of Sage 50 Accounts. If you add a Net value discount with a higher value to any of the invoice item lines, the invoice won’t update to ledgers. 

If you're unable to upgrade, follow the workaround below. 

Workaround

The workaround for this problem is to apply the discount to each individual item line rather than the total invoice. 

1. Open the affected invoice. 
2. Double-click an item line. 
3. In the 'Edit Item Line' window, select the Disc. GBP £ field. This field displays in your base currency.
4. Enter the discount value and press OK. 
5. Repeat for each line of the invoice. 
6. Press Save. 
7. Update the invoice to the ledger.