--- wave.py.1	2007-02-05 03:01:37.000000000 -0800
+++ wave.py	2007-02-05 03:06:37.000000000 -0800
@@ -452,26 +452,33 @@
         if not self._nframes:
             self._nframes = initlength / (self._nchannels * self._sampwidth)
         self._datalength = self._nframes * self._nchannels * self._sampwidth
-        self._form_length_pos = self._file.tell()
+        try:
+            self._form_length_pos = self._file.tell()
+        except: pass
         self._file.write(struct.pack('<l4s4slhhllhh4s',
             36 + self._datalength, 'WAVE', 'fmt ', 16,
             WAVE_FORMAT_PCM, self._nchannels, self._framerate,
             self._nchannels * self._framerate * self._sampwidth,
             self._nchannels * self._sampwidth,
             self._sampwidth * 8, 'data'))
-        self._data_length_pos = self._file.tell()
+        try:
+            self._data_length_pos = self._file.tell()
+        except: pass
         self._file.write(struct.pack('<l', self._datalength))
 
     def _patchheader(self):
         if self._datawritten == self._datalength:
             return
-        curpos = self._file.tell()
-        self._file.seek(self._form_length_pos, 0)
-        self._file.write(struct.pack('<l', 36 + self._datawritten))
-        self._file.seek(self._data_length_pos, 0)
-        self._file.write(struct.pack('<l', self._datawritten))
-        self._file.seek(curpos, 0)
-        self._datalength = self._datawritten
+        try:
+            curpos = self._file.tell()
+            self._file.seek(self._form_length_pos, 0)
+            self._file.write(struct.pack('<l', 36 + self._datawritten))
+            self._file.seek(self._data_length_pos, 0)
+            self._file.write(struct.pack('<l', self._datawritten))
+            self._file.seek(curpos, 0)
+            self._datalength = self._datawritten
+	except:
+            pass
 
 def open(f, mode=None):
     if mode is None: