If you transfer the invoice from the invoice log and get the message "The total of the invoice lines and any extra amount may not differ from the invoice net amount.", then the invoice total line amount doesn't match the invoice total net amount. This can happen if the supplier sends any additional charges, like freight, that is not imported into Palette, then the invoice total net amount will differ from the invoice total line amount.


If you don't use line level purchase order matching, or only the invoice total net amount is important, this validation can be disabled by a parameter on company level. 


  1.  Go to Administration -> Register -> Company and select your company.
  2.  Under Invoice log section there is a parameter called Transfer invoices from Invoice log where the line total amount is not consistent with invoice net amount.
  3.  Choose All invoices. This means that invoices will be transferred even if the invoice total net amount differ from the invoice total line amount.