diff --git a/extract_bp.py b/extract_bp.py
index 9bcdff7..833027b 100644
--- a/extract_bp.py
+++ b/extract_bp.py
@@ -92,17 +92,21 @@ print(scr.header_size)
 print(scr.last_pos)
 a = scr.extract_values()
 print(a)
-b = scr.extract_strings()
-print(b)
-print(len(a), len(b))
-missing = {}
-for key in b.keys():
-    if key not in a:
-        missing[key] = b[key]
-for key in a.keys():
-    if key not in b:
-        missing[key] = a[key]
-print(missing)
-print(len(missing))
+b = None
+try:
+    b = scr.extract_strings()
+    print(b)
+    print(len(a), len(b))
+    missing = {}
+    for key in b.keys():
+        if key not in a:
+            missing[key] = b[key]
+    for key in a.keys():
+        if key not in b:
+            missing[key] = a[key]
+    print(missing)
+    print(len(missing))
+except UnicodeDecodeError:
+    pass
 with open(json_f, "w", encoding="utf-8") as f:
-    json.dump(b, f, ensure_ascii=False, indent=2)
+    json.dump(b if b else a, f, ensure_ascii=False, indent=2)