fix(pos): unsupported operand type -= for 'float' and 'NoneType'
diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index 89fed3b..0f44ad7 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -387,7 +387,7 @@
 
 		if(this.frm.doc.scan_barcode) {
 			frappe.call({
-				method: "erpnext.selling.page.point_of_sale.point_of_sale.search_serial_or_batch_or_barcode_number",
+				method: "erpnext.selling.page.point_of_sale.point_of_sale.search_for_serial_or_batch_or_barcode_number",
 				args: { search_value: this.frm.doc.scan_barcode }
 			}).then(r => {
 				const data = r && r.message;