Error on pysnmp and/or BER Module in Python2.2

[heinl raimund]

i am using : Python 2.2 (#28, Dec 21 2001, 12:21:22) [MSC 32 bit (Intel)] on
win32
i use the pysnmp modul. for coding and encoding of
snmp packets pysnmp uses the BER Modul.

on function call to MyPySnmp_session.decode_value  i got the following
error:
session instance has no attribute
'decode_an_unsigned'-exceptions.AttributeError

is it a known bug - maybe a fixed BER/pysnmp Modul already exists ?

best regards

### CODE SNIPPLET

        session = pysnmp.session(agent, community)      # create a SNMP
session
        #the session is always not NONE - its not possible at this point to
validate a password

        for objid in lobjid:                    # encode objids
            #DBG(DBG_SNMPLO, "snmpget: %s + %s ", objid, poid)

encoded_oids.append(session.encode_oid(session.str2nums(objid+poid)))

        # build a packet
        packet = session.encode_request ('GETREQUEST', encoded_oids,
encoded_vals)

        # send SNMP request and receive a response
        packet = session.send_and_receive (packet)
        if packet == None: # if None stop condition occured
            return (-2, None)

        # parse a response packet
        (encoded_oids, encoded_vals) = session.decode_response (packet)

        index = 0
        while index < len(encoded_oids):                # decode objs & vals
            objid = session.decode_value(encoded_oids[index])



            # in Python2.2 an !!!!!!!!!!! ERROR !!!!!!!!!!!!!
            # session instance has no attribute
'decode_an_unsigned'-exceptions.AttributeError
            value = session.decode_value(encoded_vals[index])



            lval.append(value)
            if  lprivoid != None:
                pos = string.find(objid, lobjid[index])
                #DBG(DBG_SNMPLO, "snmpget:oidfind %s,%s:%d", objid,
lobjid[index], pos)
                if pos != 0:                    # OID not at begin or not
found
                    privoid = objid             # return complete ???
                else:                           # ok strip requested OID
                    pos = len(lobjid[index])
                    privoid = objid[pos:]               # return private
part
                lprivoid.append(privoid)
            index = index + 1                   # go to the next objid

        if CallBackRead != None: CallBackRead(0)
        return (index, None)


--
===========================================================
Heinl Raimund                     SSH - Software Systeme Heinl
gepr.Wirtschaftsinformatiker IHK  Am Galling 3
91217 Hersbruck
Email: heinlr at gmx.de
===========================================================