Hi,
No, there is no "system key" for Too High Amount.
Regarding Credit Invoices, system will throw you this message in these cases:
1. Your Credit Invoice's total amount is higher than the total amount of the Invoice that is being credited
2. You had the following sequence of actions made:
2.1. Created a Sales Invoice (e.g. total amount = 1000)
2.2. Created a Correction Invoice from this sales invoice. On that Correction Invoice you reduced the amount (e.g. lower quantity or lower price of item, resulting in total amount = 900)
2.3. Created a Credit Note from the original Sales Invoice. This Credit Note will have the amount from the Invoice you just credited (1000).
However, the system will find that there was a Correction Invoice and see that the amount on the Correction Invoice (900) is lower than your newly created Credit Note (1000)
System should never throw an error message about Too High Amount on Sales Invoices in the latest version (2020-06-05), unless you have some HAL customizations
Regarding Purchase Invoices:
1. The message is shown only when you are using Prepayments on the Purchase Invoice. If the total amount of all connected Prepayments exceeds the total amount of the Invoice, the system will show this message
Maybe it would be useful if you could provide the server's log file after you get such error message.
Regards,
HansaWorld