[26-Feb-2026 11:31:24 Africa/Blantyre] PHP Fatal error:  Uncaught Error: Call to undefined function getNextInvoiceNumber() in /home/smplus/powertex/cashier/controllers/sales_controller.php:922
Stack trace:
#0 /home/smplus/powertex/cashier/controllers/sales_controller.php(28): saveInvoice(Object(stock_model), Object(sales_model), Object(common_model), Object(PDO))
#1 {main}
  thrown in /home/smplus/powertex/cashier/controllers/sales_controller.php on line 922
