X-Git-Url: https://delta.frontaccounting.com/gitweb/?a=blobdiff_plain;f=purchasing%2Fsupplier_credit.php;h=6bf9f22f1e92f6016060dd3801119b78173c6324;hb=e6c89f21df1c1d6742a7e335e6e0fc2c958a7a29;hp=08040582a3b7dec469eec0a7c5ab6f6a5554bd45;hpb=5b6858588fc878c18aeb26c6b495aca7b32a5a43;p=fa-stable.git

diff --git a/purchasing/supplier_credit.php b/purchasing/supplier_credit.php
index 08040582..6bf9f22f 100644
--- a/purchasing/supplier_credit.php
+++ b/purchasing/supplier_credit.php
@@ -194,6 +194,20 @@ function check_data()
 		return false;
 	}
 
+	if (trim(get_post('supp_reference')) == false)
+	{
+		display_error(_("You must enter a supplier's invoice reference."));
+		set_focus('supp_reference');
+		return false;
+	}
+
+	if (is_reference_already_there($_SESSION['supp_trans']->supplier_id, $_POST['supp_reference'], $_SESSION['supp_trans']->trans_no))
+	{ 	/*Transaction reference already entered */
+		display_error(_("This invoice number has already been entered. It cannot be entered again.") . " (" . $_POST['supp_reference'] . ")");
+		set_focus('supp_reference');
+		return false;
+	}
+
 	if (!$SysPrefs->allow_negative_stock()) {
 		foreach ($_SESSION['supp_trans']->grn_items as $n => $item) {
 			if (is_inventory_item($item->item_code))