diff --git a/bnk.py b/bnk.py
index ab48c84..520e3ce 100644
--- a/bnk.py
+++ b/bnk.py
@@ -2,24 +2,27 @@
 import io
 from filereader import FileReader
 
-def bnk2wem(data):
+def bnk2wem(data, name):
 	# gets raw data from object
-	reader = FileReader(io.BytesIO(data), "little")
+	reader = FileReader(io.BytesIO(data), "little", name=name)
 
 	bkhd_signature = reader.ReadBytes(4)
 
 	if bkhd_signature != b"\x42\x4B\x48\x44":
-		raise Exception("not a valid bnk")
+		print(f"[WARNING] invalid bkhd signature at {reader.GetName()}")
+		return []
 
 	bkhd_size = reader.ReadUInt32()
 	reader.ReadBytes(bkhd_size)
 
 	if reader.GetBufferPos() == reader.GetStreamLength():
+		print(f"[WARNING] empty bnk file at {reader.GetName()}")
 		return [] # empty bnk
 
 	didx_signature = reader.ReadBytes(4)
 
 	if didx_signature != b"\x44\x49\x44\x58":
+		print(f"[WARNING] invalid didx signature at {reader.GetName()}")
 		return [] # invalid index signature (hirc block instead ?)
 
 	didx_size = reader.ReadUInt32()
@@ -35,6 +38,7 @@ def bnk2wem(data):
 	data_signature = reader.ReadBytes(4)
 
 	if data_signature != b"\x44\x41\x54\x41":
+		print(f"[WARNING] invalid data signature at {reader.GetName()}")
 		return [] # invalid data signature (missing sector ?)
 
 	data_size = reader.ReadUInt32()
diff --git a/extract.py b/extract.py
index 2b4d3c7..6e8c551 100644
--- a/extract.py
+++ b/extract.py
@@ -11,7 +11,12 @@ from filereader import FileReader
 
 cwd = os.getcwd()
 path = lambda *args: os.path.join(*args)
-call = lambda args: subprocess.call(args, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT)
+
+def call(args):
+	try:
+		subprocess.call(args, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT)
+	except Exception as e:
+		print(f"[WARNING] failed to extract, {e}")
 
 class WwiseExtract:
 	def __init__(self):
@@ -170,6 +175,9 @@ class WwiseExtract:
 			wem_data = data[file_data["offset"]:file_data["offset"]+file_data["size"]]
 			parsed_wem = wwise.parse_wwise(FileReader(io.BytesIO(wem_data), "little", name=f"{file[3]}:{file[0]}:{file[1]}"))
 
+			if not parsed_wem:
+				continue
+
 			file_data["metadata"] = parsed_wem
 
 			if key is not None:
diff --git a/filereader.py b/filereader.py
index 507a8ff..905bf69 100644
--- a/filereader.py
+++ b/filereader.py
@@ -11,8 +11,7 @@ class FileReader:
 	def __init__(self, file, endianness:str, name:str=None):
 		self.stream = file
 		self.endianness = endianness
-		if name:
-			self.name = name
+		self.name = name
 
 	def _read(self, mode:str, bufferLength:int, endianness:str=None, pos:int=None) -> bytes:
 		# endianness override
diff --git a/wavescan.py b/wavescan.py
index 55e1fa8..af33961 100644
--- a/wavescan.py
+++ b/wavescan.py
@@ -220,7 +220,7 @@ def extract_sector(section_size, is_sounds, is_externals, ext, endianness, lang_
 			bnk_data = reader.ReadBytes(size)
 			reader.SetBufferPos(pos)
 
-			wems = bnk2wem(bnk_data)
+			wems = bnk2wem(bnk_data, f"{filename}@{pos}.{size}")
 
 			for wem in wems:
 				wwise_data.append([f"{os.path.basename(name).split('.')[0]}_{wem[0]}.wem", offset+wem[1], wem[2], filename])
diff --git a/wwise.py b/wwise.py
index 0a0dd4b..1501a08 100644
--- a/wwise.py
+++ b/wwise.py
@@ -23,7 +23,7 @@ def parse_wwise(reader):
 
 	if reader.GetStreamLength() == 0:
 		print(f"[WARNING] null stream size at {reader.GetName()}, unreadable block")
-		return metadata
+		return None
 
 	header = reader.ReadBytes(4)
 
@@ -34,7 +34,7 @@ def parse_wwise(reader):
 		reader.endianness = "little"
 	else:
 		print(f"[WARNING] invalid header {header} at {reader.GetName()}, assuming unreadable")
-		return metadata
+		return None
 
 	# additional check
 	reader.SetBufferPos(0x08)
@@ -42,7 +42,7 @@ def parse_wwise(reader):
 
 	if check != b"WAVE" and check != "XWMA":
 		print(f"[WARNING] invalid check mark {check}, assuming unreadable")
-		return metadata
+		return None
 
 	# read chunks
 	reader.SetBufferPos(0x0C)
@@ -71,7 +71,7 @@ def parse_wwise(reader):
 	fmt_length = chunks["fmt"]["length"]
 	if fmt_length < 0x10:
 		print(f"[WARNING] invalid fmt chunk length {fmt_length} at {reader.GetName()}, skipping")
-		return metadata
+		return None
 
 	reader.SetBufferPos(chunks["fmt"]["offset"])
 
@@ -94,7 +94,7 @@ def parse_wwise(reader):
 
 	if metadata["format"] == 0x0166:
 		print(f"[WARNING] XMA2WAVEFORMATEX in fmt at {reader.GetName()}")
-		return metadata
+		return None
 
 	# parse codec
 	codecs = {
@@ -122,7 +122,7 @@ def parse_wwise(reader):
 
 	if metadata["format"] not in codecs:
 		print(f'[WARNING] unknown codec {metadata["format"]} at {reader.GetName()}')
-		return metadata
+		return None
 
 	codec = codecs[metadata["format"]]
 
@@ -153,18 +153,18 @@ def parse_wwise(reader):
 	elif metadata["codec"] == "VORBIS":
 		if (metadata["blockSize"] != 0 or metadata["bitsPerSample"] != 0):
 			print(f"[WARNING] worbis type at {reader.GetName()}, skipping")
-			return metadata
+			return None
 
 		if "vorb" in chunks:
 			# vorb chunk only in wwise earlier to 2012, therefore impossible for mihoyo games
 			print(f"[WARNING] found vorb chunk at {reader.GetName()}, is this the correct game ?")
-			return metadata
+			return None
 
 		extra_offset = chunks["fmt"]["offset"] + 0x18
 
 		if metadata["extraSize"] != 0x30:
 			print(f"[WARNING] unknown extra wwise size at {reader.GetName()}, skipping")
-			return metadata
+			return None
 
 		data_offset = 0x10
 		blocks_offset = 0x28