diff --git a/kindlecomicconverter/KCC_gui.py b/kindlecomicconverter/KCC_gui.py
index 26e496b..e2b255b 100644
--- a/kindlecomicconverter/KCC_gui.py
+++ b/kindlecomicconverter/KCC_gui.py
@@ -424,6 +424,8 @@ class WorkerThread(QThread):
                             MW.addMessage.emit('Created EPUB file was too big.', 'error', False)
                             MW.addMessage.emit('EPUB file: ' + str(epubSize) + 'MB. Supported size: ~350MB.', 'error',
                                                False)
+                        if self.kindlegenErrorCode[0] == 3221226505:
+                            MW.addMessage.emit('Unknown Windows error. Possibly filepath too long?', 'error', False)
                 else:
                     for item in outputPath:
                         if GUI.targetDirectory and GUI.targetDirectory != os.path.dirname(item):
diff --git a/kindlecomicconverter/comic2ebook.py b/kindlecomicconverter/comic2ebook.py
index 4a2dcc2..ff430a2 100755
--- a/kindlecomicconverter/comic2ebook.py
+++ b/kindlecomicconverter/comic2ebook.py
@@ -1370,7 +1370,7 @@ def makeMOBIWorker(item):
                 break
         # ERROR: KCC unknown generic error
         if kindlegenErrorCode == 0:
-            kindlegenErrorCode = 1
+            kindlegenErrorCode = err.returncode
             kindlegenError = err.stdout
         return [kindlegenErrorCode, kindlegenError, item]