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 will not update to ledgers. 

 NOTE: This issue is resolved in v30.1 and above of Sage 50 Accounts. If you aren't using the latest version, upgrade now.

If you are unable to upgrade currently 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. Click Disc. GBP £.
4. Enter the discount value and click OK. 
5. Repeat for each line of the invoice. 
6. Click Save. 
7. Update the invoice to the ledger.