[NEST Users] problem loading pynn nest installed from live media

Hi After installing NEST ubuntu 18.04 live media (lubuntu-18.04_nest-2.18.0.ova downloaded a few days ago), I get the following error message but a m able to import nest in python3 ok: nest@nestvm:~$ python3 Python 3.6.8 (default, Jan 14 2019, 11:02:34) [GCC 8.0.1 20180414 (experimental) [trunk revision 259383]] on linux Type "help", "copyright", "credits" or "license" for more information. [INFO] [2019.8.21 14:31:47 /home/nest/work/nest-simulator-2.18.0/nestkernel/rng_manager.cpp:217 @ Network::create_rngs_] : Creating default RNGs [INFO] [2019.8.21 14:31:47 /home/nest/work/nest-simulator-2.18.0/nestkernel/rng_manager.cpp:260 @ Network::create_grng_] : Creating new default global RNG -- N E S T -- Copyright (C) 2004 The NEST Initiative Version: nest-2.18.0 Built: Jul 2 2019 15:09:55 This program is provided AS IS and comes with NO WARRANTY. See the file LICENSE for details. Problems or suggestions? Visit https://www.nest-simulator.org Type 'nest.help()' to find out more about NEST. Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python3.6/dist-packages/pyNN/nest/__init__.py", line 18, in <module> from . import simulator File "/usr/local/lib/python3.6/dist-packages/pyNN/nest/simulator.py", line 257, in <module> state = _State() # a Singleton, so only a single instance ever exists File "/usr/local/lib/python3.6/dist-packages/pyNN/nest/simulator.py", line 59, in __init__ self.verbosity = "warning" File "/usr/local/lib/python3.6/dist-packages/pyNN/nest/simulator.py", line 120, in _set_verbosity nest.sli_run("M_%s setverbosity" % verbosity.upper()) AttributeError: module 'nest' has no attribute 'sli_run' Any suggestions? Thanks.