diff --git a/__init__.py b/__init__.py
index 2eddda1..36e2f46 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1426,6 +1426,18 @@ def load_used_glyphs():
         a = Font.test_availability(t.font_name,
                                    t.face_name,
                                    t.text)
+        if type(a) == type(int()):
+            if a == Font.MISSING_FONT:
+                butils.ShowMessageBox("Missing Font",
+                                      "ERROR",
+                                      [f"Font {t.font_name} is missing.",
+                                       "Do you have it installed?"])
+            if a is Font.MISSING_FACE:
+                butils.ShowMessageBox("Missing FontFace",
+                                      "ERROR",
+                                      [f"Font {t.font_name} is there,",
+                                       f"but the FontFace {t.face_name} is missing,",
+                                       "Do you have it installed?"])
         if len(a["maybe"]) > 0:
             for fp in a["filepaths"]:
                 butils.load_font_from_filepath(fp, a["maybe"])