diff --git a/calendar/teachingdates/app.py b/calendar/teachingdates/app.py
index 1b2bb7b..4d448e2 100644
--- a/calendar/teachingdates/app.py
+++ b/calendar/teachingdates/app.py
@@ -3,6 +3,8 @@
 import pathlib
 import sys
 
+from jinja2 import TemplateNotFound
+
 import teachingdates.calendars as calendars
 import teachingdates.config as configuration
 from teachingdates import PROG
@@ -24,21 +26,20 @@
         if args.debug:
             print("Calendar: {cal}".format(cal=cal.calendar()))
             print("Lectures: {lec}".format(lec=cal.lecture_dates()))
-        for c in cal.render(args.style, args.format):
-            print(c)
+        print(cal.render(args.style, args.format))
 
     except configuration.ConfigurationError as e:
         print("{prog}: error: failed to load configuration from "
-              "'{file}'.".format(prog=PROG, file=e))
+              "'{file}'".format(prog=PROG, file=e))
     except configuration.PaperKeyError as e:
         print("{prog}: error: paper '{paper}' in '{file}' is missing "
-              "required key '{key}'.".format(prog=PROG,
+              "required key '{key}'".format(prog=PROG,
                                              paper=e.parent,
                                              file=e.file,
                                              key=e.key))
     except configuration.PeriodKeyError as e:
         print("{prog}: error: teaching period '{period}' in '{file}' is "
-              "missing required key '{key}'.".format(prog=PROG,
+              "missing required key '{key}'".format(prog=PROG,
                                                      period=e.parent,
                                                      file=e.file,
                                                      key=e.key))
@@ -50,4 +51,8 @@
                                  period=args.period))
     except configuration.PeriodError as e:
         print("{prog}: error: no entry for teaching period '{period}' in "
-              "'{file}'.".format(prog=PROG, file=e, period=args.period))
+              "'{file}'".format(prog=PROG, file=e, period=args.period))
+    except TemplateNotFound as e:
+        print("{prog}: error: no template found for output style '{style}' "
+              "and output format '{format}' (expected '{file}')".format(
+                  prog=PROG, style=args.style, format=args.format, file=e))