diff --git a/iped-app/src/main/java/iped/app/bootstrap/Bootstrap.java b/iped-app/src/main/java/iped/app/bootstrap/Bootstrap.java
index 9669b7efd1..8644f3ae0d 100644
--- a/iped-app/src/main/java/iped/app/bootstrap/Bootstrap.java
+++ b/iped-app/src/main/java/iped/app/bootstrap/Bootstrap.java
@@ -145,10 +145,7 @@ protected void run(String args[]) {
                 classpath += separator + pluginConfig.getPluginFolder().getAbsolutePath() + "/*";
             }
 
-            // user can't open analysis UI w/ --nogui, so no need to load libreoffice jars
-            if (!iped.getCmdLineArgs().isNogui()) {
-                classpath = fillClassPathWithLibreOfficeJars(iped, classpath);
-            }
+            classpath = fillClassPathWithLibreOfficeJars(iped, classpath, iped.getCmdLineArgs().isNogui());
 
             String javaBin = "java";
             if (SystemUtils.IS_OS_WINDOWS) {
@@ -278,14 +275,14 @@ private static List<String> getSystemProperties() {
         return props;
     }
 
-    private static String fillClassPathWithLibreOfficeJars(Main iped, String classpath)
+    private static String fillClassPathWithLibreOfficeJars(Main iped, String classpath, boolean isNogui)
             throws URISyntaxException, IOException {
         System.setProperty(IOfficeApplication.NOA_NATIVE_LIB_PATH,
                 new File(iped.getRootPath(), "lib/nativeview").getAbsolutePath());
         LibreOfficeFinder loFinder = new LibreOfficeFinder(new File(iped.getRootPath()));
-        if (loFinder.getLOPath() != null) {
+        if (loFinder.getLOPath(isNogui) != null) {
             List<File> jars = new ArrayList<>();
-            UNOLibFinder.addUNOJars(loFinder.getLOPath(), jars);
+            UNOLibFinder.addUNOJars(loFinder.getLOPath(isNogui), jars);
             for (File jar : jars) {
                 classpath += separator + jar.getCanonicalPath();
             }
diff --git a/iped-app/src/main/java/iped/app/ui/ViewerController.java b/iped-app/src/main/java/iped/app/ui/ViewerController.java
index d056ad6e34..852eeb77d7 100644
--- a/iped-app/src/main/java/iped/app/ui/ViewerController.java
+++ b/iped-app/src/main/java/iped/app/ui/ViewerController.java
@@ -116,7 +116,7 @@ public void run() {
                     URI jarUri = URLUtil.getURL(LibreOfficeViewer.class).toURI();
                     File moduledir = new File(jarUri).getParentFile().getParentFile();
                     LibreOfficeFinder loFinder = new LibreOfficeFinder(moduledir);
-                    final String pathLO = loFinder.getLOPath();
+                    final String pathLO = loFinder.getLOPath(false);
                     if (pathLO != null) {
                         SwingUtilities.invokeAndWait(new Runnable() {
                             @Override
diff --git a/iped-engine/src/main/java/iped/engine/task/DocThumbTask.java b/iped-engine/src/main/java/iped/engine/task/DocThumbTask.java
index 98753a8d9d..bea7aca9d1 100644
--- a/iped-engine/src/main/java/iped/engine/task/DocThumbTask.java
+++ b/iped-engine/src/main/java/iped/engine/task/DocThumbTask.java
@@ -94,7 +94,7 @@ public void init(ConfigurationManager configurationManager) throws Exception {
                         URL url = URLUtil.getURL(this.getClass());
                         File jarDir = new File(url.toURI()).getParentFile();
                         LibreOfficeFinder loFinder = new LibreOfficeFinder(jarDir);
-                        loPath = loFinder.getLOPath();
+                        loPath = loFinder.getLOPath(true);
                         logger.info("LibreOffice Path: " + loPath);
                     }
 
diff --git a/iped-viewers/iped-viewers-impl/src/main/java/iped/viewers/util/LOExtractor.java b/iped-viewers/iped-viewers-impl/src/main/java/iped/viewers/util/LOExtractor.java
index 6de5ea345d..ddeadf26d5 100644
--- a/iped-viewers/iped-viewers-impl/src/main/java/iped/viewers/util/LOExtractor.java
+++ b/iped-viewers/iped-viewers-impl/src/main/java/iped/viewers/util/LOExtractor.java
@@ -32,7 +32,7 @@ public LOExtractor(File input, File output) {
         this.input = input;
     }
 
-    public boolean decompressLO() {
+    public boolean decompressLO(boolean isNogui) {
 
         try {
             if (output.exists()) {
@@ -44,14 +44,16 @@ public boolean decompressLO() {
             }
 
             if (input.exists()) {
-                SwingUtilities.invokeLater(new Runnable() {
-                    @Override
-                    public void run() {
-                        progressMonitor = new ProgressDialog(null, LOExtractor.this);
-                        progressMonitor.setMaximum(numSubitens);
-                        progressMonitor.setNote(Messages.getString("LOExtractor.DecompressingLO")); //$NON-NLS-1$
-                    }
-                });
+                if (!isNogui) {
+                    SwingUtilities.invokeLater(new Runnable() {
+                        @Override
+                        public void run() {
+                            progressMonitor = new ProgressDialog(null, LOExtractor.this);
+                            progressMonitor.setMaximum(numSubitens);
+                            progressMonitor.setNote(Messages.getString("LOExtractor.DecompressingLO")); //$NON-NLS-1$
+                        }
+                    });
+                }
 
                 try (ZipFile zip = new ZipFile(input)) {
                     Enumeration<ZipArchiveEntry> e = zip.getEntries();
@@ -69,15 +71,17 @@ public void run() {
                             if (++progress == numSubitens)
                                 completed = true;
 
-                            progressMonitor.setProgress(progress);
-
-                            if (progressMonitor.isCanceled())
-                                break;
+                            if (progressMonitor != null) {
+                                progressMonitor.setProgress(progress);
+    
+                                if (progressMonitor.isCanceled())
+                                    break;
+                            }
                         }
                     }
                 }
 
-                if (!progressMonitor.isCanceled()) {
+                if (progressMonitor != null && !progressMonitor.isCanceled()) {
                     progressMonitor.close();
                 }
 
diff --git a/iped-viewers/iped-viewers-impl/src/main/java/iped/viewers/util/LibreOfficeFinder.java b/iped-viewers/iped-viewers-impl/src/main/java/iped/viewers/util/LibreOfficeFinder.java
index 51170b7a23..c23283bb80 100644
--- a/iped-viewers/iped-viewers-impl/src/main/java/iped/viewers/util/LibreOfficeFinder.java
+++ b/iped-viewers/iped-viewers-impl/src/main/java/iped/viewers/util/LibreOfficeFinder.java
@@ -36,7 +36,7 @@ public LibreOfficeFinder(File baseFolder) {
         baseDir = baseFolder;
     }
 
-    public String getLOPath() {
+    public String getLOPath(boolean isNogui) {
         if (detectedPath == null) {
             detectedPath = System.getProperty("libreOfficePath");
             if (detectedPath != null)
@@ -62,7 +62,7 @@ public String getLOPath() {
 
                 if (winPathLO.exists() || compressedLO.exists()) { // $NON-NLS-1$ //$NON-NLS-2$
                     LOExtractor extractor = new LOExtractor(compressedLO, winPathLO);
-                    if (extractor.decompressLO())
+                    if (extractor.decompressLO(isNogui))
                         detectedPath = winPathLO.getAbsolutePath();
                 }
             }