When running test_bsddb3 on Mac OSX, using BSDDB 4.0.14, I get tracebacks like these: Exception in thread writer 0: Traceback (most recent call last): File "/Users/guido/python/src/Lib/threading.py", line 416, in __bootstrap self.run() File "/Users/guido/python/src/Lib/threading.py", line 404, in run apply(self.__target, self.__args, self.__kwargs) File "/Users/guido/python/src/Lib/bsddb/test/test_thread.py", line 115, in writerThread dbutils.DeadlockWrap(d.put, key, self.makeData(key), max_retries=12) File "/Users/guido/python/src/Lib/bsddb/dbutils.py", line 61, in DeadlockWrap except _db.DBLockDeadlockError: NameError: global name '_db' is not defined and these: Exception in thread reader 8: Traceback (most recent call last): File "/Users/guido/python/src/Lib/threading.py", line 416, in __bootstrap self.run() File "/Users/guido/python/src/Lib/threading.py", line 404, in run apply(self.__target, self.__args, self.__kwargs) File "/Users/guido/python/src/Lib/bsddb/test/test_thread.py", line 140, in readerThread c = d.cursor() DBNoMemoryError: (12, 'Cannot allocate memory -- Lock table is out of available locks') Any clues??? I don't get these on Linux, although there I get a failure too: test test_bsddb3 failed -- errors occurred; run in verbose mode for details Frankly, verbose mode waas too verbose to bother. :-( --Guido van Rossum (home page: http://www.python.org/~guido/)