ref : problem AssertionError: SRE module mismatch

[Rami Alfalahi (EAB)]

Hi,
I am using python-2.2.2, with jython-20030225, however I am getting the
following problem:
import os
after executing the line below I keep getting the problems.
res = os.listdir(a)

File "D:\H-Drive-content\download\jython\jython-20030225\Lib\javaos.py", line 104, in ?  
File "D:\H-Drive-content\download\jython\jython-20030225\Lib\javashell.py", line 16, in ?   
File "D:\H-Drive-content\download\python\Lib\re.py", line 27, in ?   
File "D:\H-Drive-content\download\python\Lib\sre.py", line 97, in ?   
File "D:\H-Drive-content\download\python\Lib\sre_compile.py", line 17, in ? AssertionError: SRE module mismatch

Can you please point tell me what is the cause of the problem, this is the first time  I have used the os.py class

Your prompt response is greatly appreciated.

Rami