diff --git a/align.py b/align.py
index c5a66fe..9067676 100755
--- a/align.py
+++ b/align.py
@@ -241,8 +241,13 @@ try:
         #     log.error("Unable to load Qt4 support. Is it installed?")
         #     sys.exit(1)
         QApplication, ui_package = utils.import_dialog(ui_toolkit)
-        ui = import_module(ui_package + ".aligndialog")

+        try:
+            ui = import_module(ui_package + ".aligndialog")
+        except ModuleNotFoundError:
+            log.error('HPLIP GUI is not available - use interactive mode '
+                      '(option \'-i\') or install hplip-gui package.')
+            sys.exit(1)

         #try:
         if 1:
diff --git a/base/queues.py b/base/queues.py
index 04c37b1..dec7fe9 100755
--- a/base/queues.py
+++ b/base/queues.py
@@ -375,8 +375,14 @@ def main_function(passwordObj = None, mode = GUI_MODE, ui_toolkit= UI_TOOLKIT_QT
             sys.exit(1)

         QApplication, ui_package = utils.import_dialog(ui_toolkit)
-        ui = import_module(ui_package + ".queuesconf")
-        setupdialog = import_module(ui_package + ".setupdialog")
+
+        try:
+            ui = import_module(ui_package + ".queuesconf")
+            setupdialog = import_module(ui_package + ".setupdialog")
+        except ModuleNotFoundError:
+            log.error('HPLIP GUI is not available - use interactive mode '
+                      '(option \'-i\') or install hplip-gui package.')
+            sys.exit(1)

         app = QApplication(sys.argv)
         dialog = ui.QueuesDiagnose(None, "","",QUEUES_MSG_SENDING,passwordObj)
diff --git a/base/utils.py b/base/utils.py
index cde819f..0d6e9ff 100644
--- a/base/utils.py
+++ b/base/utils.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # -*- coding: utf-8 -*-
 #
 # (c) Copyright 2001-2018 HP Development Company, L.P.
@@ -734,6 +734,13 @@ def checkPyQtImport(): # qt3
         if os.getenv('DISPLAY') and os.getenv('STARTED_FROM_MENU'):
             no_qt_message_gtk()

+        # hplip-gui sub-package (Fedora)
+        try:
+            import ui
+        except ImportError:
+            log.error("hplip-gui not installed.  GUI not available. Exiting.")
+            return False
+
         log.error("PyQt not installed. GUI not available. Exiting.")
         return False

@@ -784,7 +791,8 @@ def checkPyQtImport4():
         import PyQt5
         import ui5
     else:
-        log.debug("HPLIP is not installed properly or is installed without graphical support. Please reinstall HPLIP again")
+        # hplip-gui sub-package (Fedora) requires python3-qt5
+        log.error("Install the hplip-gui package for graphical support.")
         return False
     return True

@@ -2456,6 +2464,7 @@ def checkPyQtImport45():
     except ImportError as e:
         log.debug(e)

+    log.error("Install the hplip-gui package for graphical support.")
     raise ImportError("GUI Modules PyQt4 and PyQt5 are not installed")


@@ -2477,6 +2486,7 @@ def import_dialog(ui_toolkit):
             return  (QApplication, "ui4")
         except ImportError as e:
             log.error(e)
+            log.error("Unable to load Qt support. Is hplip-gui package installed?")
             sys.exit(1)
     elif ui_toolkit == "qt5":
         try:
@@ -2485,9 +2495,7 @@ def import_dialog(ui_toolkit):
             return (QApplication, "ui5")
         except ImportError as e:
             log.error(e)
-            sys.exit(1)
-        else:
-            log.error("Unable to load Qt support. Is it installed?")
+            log.error("Unable to load Qt support. Is hplip-gui package installed?")
             sys.exit(1)


diff --git a/clean.py b/clean.py
index 3d41f04..0141f23 100755
--- a/clean.py
+++ b/clean.py
@@ -193,8 +193,13 @@ try:
     else:

         QApplication, ui_package = utils.import_dialog(ui_toolkit)
-        ui = import_module(ui_package + ".cleandialog")

+        try:
+            ui = import_module(ui_package + ".cleandialog")
+        except ModuleNotFoundError:
+            log.error('HPLIP GUI is not available - use interactive mode '
+                      '(option \'-i\') or install hplip-gui package.')
+            sys.exit(1)

         #try:
         if 1:
diff --git a/diagnose_plugin.py b/diagnose_plugin.py
index e4e6ebd..1bcd8c3 100755
--- a/diagnose_plugin.py
+++ b/diagnose_plugin.py
@@ -94,7 +94,14 @@ if mode == GUI_MODE:
         #     sys.exit(1)

         QApplication, ui_package = utils.import_dialog(ui_toolkit)
-        ui = import_module(ui_package + ".plugindiagnose")
+
+        try:
+            ui = import_module(ui_package + ".plugindiagnose")
+        except ModuleNotFoundError:
+            log.error('HPLIP GUI is not available - use interactive mode '
+                      '(option \'-i\') or install hplip-gui package.')
+            sys.exit(1)
+
         from installer import pluginhandler

         app = QApplication(sys.argv)
diff --git a/fab.py b/fab.py
index 9bd6166..e11ebc4 100755
--- a/fab.py
+++ b/fab.py
@@ -854,8 +854,13 @@ if mode == GUI_MODE:
     else: # qt4

         QApplication, ui_package = utils.import_dialog(ui_toolkit)
-        ui = import_module(ui_package + ".fabwindow")

+        try:
+            ui = import_module(ui_package + ".fabwindow")
+        except ModuleNotFoundError:
+            log.error('HPLIP GUI is not available - use interactive mode '
+                      '(option \'-i\') or install hplip-gui package.')
+            sys.exit(1)

         log.set_module("hp-fab(qt4)")

diff --git a/firmware.py b/firmware.py
index 33e044d..a38058b 100755
--- a/firmware.py
+++ b/firmware.py
@@ -118,7 +118,13 @@ try:
            #  log.error("Unable to load Qt4 support. Is it installed?")
            #  sys.exit(1)
             QApplication, ui_package = utils.import_dialog(ui_toolkit)
-            ui = import_module(ui_package + ".firmwaredialog")
+
+            try:
+                ui = import_module(ui_package + ".firmwaredialog")
+            except ModuleNotFoundError:
+                log.error('HPLIP GUI is not available - use interactive mode '
+                          '(option \'-i\') or install hplip-gui package.')
+                sys.exit(1)

         if ui_toolkit == 'qt3':
            try:
diff --git a/info.py b/info.py
index 6c28531..5b05eda 100755
--- a/info.py
+++ b/info.py
@@ -172,7 +172,13 @@ try:

     else: # GUI mode
         QApplication, ui_package = utils.import_dialog(ui_toolkit)
-        ui = import_module(ui_package + ".infodialog")
+
+        try:
+            ui = import_module(ui_package + ".infodialog")
+        except ModuleNotFoundError:
+            log.error('HPLIP GUI is not available - use interactive mode '
+                      '(option \'-i\') or install hplip-gui package.')
+            sys.exit(1)

         if 1:
             app = QApplication(sys.argv)
diff --git a/plugin.py b/plugin.py
index f54f726..58d6006 100755
--- a/plugin.py
+++ b/plugin.py
@@ -252,7 +252,14 @@ if mode == GUI_MODE:
         #     clean_exit(1)

         QApplication, ui_package = utils.import_dialog(ui_toolkit)
-        ui = import_module(ui_package + ".plugindialog")
+
+        try:
+            ui = import_module(ui_package + ".plugindialog")
+        except ModuleNotFoundError:
+            log.error('HPLIP GUI is not available - use interactive mode '
+                      '(option \'-i\') or install hplip-gui package.')
+            sys.exit(1)
+
         if ui_toolkit == "qt5":
             from PyQt5.QtWidgets import QMessageBox
         elif ui_toolkit == "qt4":
diff --git a/sendfax.py b/sendfax.py
index 491c8f9..0815ee7 100755
--- a/sendfax.py
+++ b/sendfax.py
@@ -211,7 +211,13 @@ if mode == GUI_MODE:
         #     sys.exit(1)

         QApplication, ui_package = utils.import_dialog(ui_toolkit)
-        ui = import_module(ui_package + ".sendfaxdialog")
+
+        try:
+            ui = import_module(ui_package + ".sendfaxdialog")
+        except ModuleNotFoundError:
+            log.error('HPLIP GUI is not available - use interactive mode '
+                      '(option \'-i\') or install hplip-gui package.')
+            sys.exit(1)

         app = QApplication(sys.argv)
         dlg = ui.SendFaxDialog(None, printer_name, device_uri, mod.args)
diff --git a/setup.py b/setup.py
index 2608f95..b09a8ef 100755
--- a/setup.py
+++ b/setup.py
@@ -310,7 +310,12 @@ if mode == GUI_MODE:
         #     clean_exit(1)

         QApplication, ui_package = utils.import_dialog(ui_toolkit)
-        ui = import_module(ui_package + ".setupdialog")
+        try:
+            ui = import_module(ui_package + ".setupdialog")
+        except ModuleNotFoundError:
+            log.error('HPLIP GUI is not available - use interactive mode '
+                      '(option \'-i\') or install hplip-gui package.')
+            sys.exit(1)

         app = QApplication(sys.argv)
         log.debug("Sys.argv=%s printer_name=%s param=%s jd_port=%s device_uri=%s remove=%s" % (sys.argv, printer_name, param, jd_port, device_uri, remove))
diff --git a/testpage.py b/testpage.py
index a5ed2bc..2a707a1 100755
--- a/testpage.py
+++ b/testpage.py
@@ -77,7 +77,13 @@ try:
         #     log.error("Unable to load Qt4 support. Is it installed?")
         #     sys.exit(1)
         QApplication, ui_package = utils.import_dialog(ui_toolkit)
-        ui = import_module(ui_package + ".printtestpagedialog")
+
+        try:
+            ui = import_module(ui_package + ".printtestpagedialog")
+        except ModuleNotFoundError:
+            log.error('HPLIP GUI is not available - use interactive mode '
+                      '(option \'-i\') or install hplip-gui package.')
+            sys.exit(1)

         log.set_module("%s(UI)" % __mod__)