diff --git a/mccs-it/thermal/app.js b/mccs-it/thermal/app.js
index f72a271..f481840 100644
--- a/mccs-it/thermal/app.js
+++ b/mccs-it/thermal/app.js
@@ -26,16 +26,16 @@ app.post('/print-credentials', async (req, res) => {
 			Thermal.print().then(res => {
 				res.send('PDF sent to printer successfully.');
 			}).catch(e => {
-				console.error('Failed to start printing process:', err);
-				res.status(500).json({ message: 'Failed to start printing process', error: err.message });
+				console.error('Failed to start printing process:', e);
+				res.status(500).json({ message: 'Failed to start printing process', error: e.message });
 			});
 		}).catch(e => {
 			console.error(e);
-			res.status(500).json({ message: 'Error writing PDF file', error: err.message });
+			res.status(500).json({ message: 'Error writing PDF file', error: e.message });
 		});
-	} catch (error) {
-		console.error('Print Error:', error);
-		res.status(500).json({ message: 'Print Error', error: error.message });
+	} catch (e) {
+		console.error('Print Error:', e);
+		res.status(500).json({ message: 'Print Error', error: e.message });
 	}
 });