marco@marco-x41:~$ lv2rack http://home.gna.org/zyn/zynadd/1
lash_open_socket: could not connect to host 'localhost', service '14541'
lash_comm_connect_to_server: could not create server connection
Connected to JACK server with client name 'LASH_Server'
Opened ALSA sequencer with client ID 130
Listening for connections
Created project project-1 in directory /home/marco/audio-projects/project-1
Added client 482a4161-efbf-47c3-9474-8f1b0506fdae of class lv2rack to project project-1
Successfully connected to LASH server at localhost
Loading LV2 plugin cache from "/home/marco/.cache/lv2rack/plugins"
Traceback (most recent call last):
  File "/usr/local/bin/lv2rack", line 337, in <module>
    main()
  File "/usr/local/bin/lv2rack", line 327, in main
    host = lv2rack_single(program_data, client_name, sys.argv[1])
  File "/usr/local/bin/lv2rack", line 272, in __init__
    self.plugin = self.new_plugin(uri)
  File "/usr/local/bin/lv2rack", line 283, in new_plugin
    plugin = lv2rack.new_plugin(self, uri, parameters, maps)
  File "/usr/local/bin/zynjacku.py", line 2293, in new_plugin
    info = self.lv2db.getPluginInfo(uri)
  File "/usr/local/lib/python2.6/dist-packages/zynworld/lv2.py", line 459, in getPluginInfo
    info, sources = self.get_plugin_full_model(uri)
TypeError: 'NoneType' object is not iterable
marco@marco-x41:~$ Client 482a4161-efbf-47c3-9474-8f1b0506fdae removed from project project-1
Project project-1 removed

marco@marco-x41:~$ zynjacku http://home.gna.org/zyn/zynadd/1
lash_init: Not attempting to start daemon server automatically
Created project project-1 in directory /home/marco/audio-projects/project-1
Added client f1d7f0a5-ba13-4c1c-a076-646c4a6a94f2 of class zynjacku to project project-1
Successfully connected to LASH server at localhost
Loading LV2 plugin cache from "/home/marco/.cache/zynjacku/plugins"
Traceback (most recent call last):
  File "/usr/local/bin/zynjacku", line 3141, in <module>
    main()
  File "/usr/local/bin/zynjacku", line 3130, in main
    host = ZynjackuHostOne(program_data, client_name, sys.argv[1])
  File "/usr/local/bin/zynjacku", line 3013, in __init__
    self.plugin = self.new_plugin(uri)
  File "/usr/local/bin/zynjacku", line 3024, in new_plugin
    plugin = ZynjackuHost.new_plugin(self, uri, parameters, maps)
  File "/usr/local/bin/zynjacku", line 2293, in new_plugin
    info = self.lv2db.getPluginInfo(uri)
  File "/usr/local/lib/python2.6/dist-packages/zynworld/lv2.py", line 459, in getPluginInfo
    info, sources = self.get_plugin_full_model(uri)
TypeError: 'NoneType' object is not iterable
marco@marco-x41:~$ Client f1d7f0a5-ba13-4c1c-a076-646c4a6a94f2 removed from project project-1
Project project-1 removed
marco@marco-x41:~$


Thanks Nedko