I have been running OpenERP 6.1 on Ubuntu server 12.04 LTS for the last 3 or 4 months. During that time I restarted (rebooted) Ubuntu several times. I installed OpenERP from a downloaded package from their web site. I manually added the pychart.py module as it wouldn't start openerp-server without it. Everything was running smoothly until now.

Today I replaced the procurement.pyc file with a modified recompiled version and backed up the original version under a different name.
I then restarted openerp-server (sudo service openerp restart).
I connected to openerp from my Firefox windows client, and got a "No handler found" white screen.

Before all that manipulation it was working fine. So I thought I'd stuffed it up with my change and decided to revert back the original procurement.pyc file.
Restarted openerp-server following the same procedure as above but still got the "No handler found" white screen.

Rebooted Ubuntu, restarted openerp-server from the services and manually numerous times, refreshed the firefox connection, added the port 8069/tcp OUT to UFW as it was only IN. Nothing helped, I still get the "No handler found" white screen.

How is that possible???

I read other identical issues on the net from other people, but every time they seem to have found their own resolution.

The only thing I rely on is the log file:

```
2013-01-07 14:10:03,958 1381 INFO ? openerp: OpenERP version 6.1-20121008-233119

2013-01-07 14:10:03,958 1381 INFO ? openerp: addons paths: /home/download/openerp- 6.1-20121008-233119/openerp/addons

2013-01-07 14:10:03,958 1381 INFO ? openerp: database hostname: localhost
2013-01-07 14:10:03,958 1381 INFO ? openerp: database port: 5432
2013-01-07 14:10:03,959 1381 INFO ? openerp: database user: openerp
2013-01-07 14:10:03,959 1381 INFO ? openerp.service.netrpc_server: starting NET-RPC service on 0.0.0.0:8070
2013-01-07 14:10:03,960 1381 INFO ? openerp.netsvc: Starting 1 services
2013-01-07 14:10:03,986 1381 INFO ? openerp.wsgi.core: HTTP service (werkzeug) running on 0.0.0.0:8069
2013-01-07 14:10:04,062 1381 INFO ? openerp.addons.web: embedded mode
2013-01-07 14:10:04,226 1381 CRITICAL ? openerp.modules.module: Couldn't load module web
2013-01-07 14:10:04,227 1381 CRITICAL ? openerp.modules.module: No module named sale_order
2013-01-07 14:10:04,227 1381 ERROR ? openerp: Failed to load server-wide module `web`.
The `web` module is provided by the addons found in the `openerp-web` project.
Maybe you forgot to add those addons in your addons_path configuration.
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_20121008_233119-py2.7.egg/EGG-INFO/scripts/openerp-server", line 252, in <module>
    openerp.modules.module.load_openerp_module(m)
  File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_20121008_233119-py2.7.egg/openerp/modules/module.py", line 419, in load_openerp_module
    getattr(sys.modules['openerp.addons.' + module_name], info['post_load'])()
  File "/home/download/openerp-6.1-20121008-233119/openerp/addons/web/__init__.py", line 29, in wsgi_postload
    app = common.http.Root(o)
  File "/home/download/openerp-6.1-20121008-233119/openerp/addons/web/common/http.py", line 453, in __init__
    static_dirs = self._load_addons(openerp_addons_namespace)
  File "/home/download/openerp-6.1-20121008-233119/openerp/addons/web/common/http.py", line 523, in _load_addons
    m = __import__('openerp.addons.' + module)
  File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_20121008_233119-py2.7.egg/openerp/modules/module.py", line 139, in load_module
    mod = imp.load_module('openerp.addons.' + module_part, f, path, descr)
  File "/home/download/openerp-6.1-20121008-233119/openerp/addons/sale/__init__.py", line 29, in <module>
    import report
  File "/home/download/openerp-6.1-20121008-233119/openerp/addons/sale/report/__init__.py", line 22, in <module>
    import sale_order
ImportError: No module named sale_order
2013-01-07 14:10:04,228 1381 INFO ? openerp: OpenERP server is running, waiting for connections...
2013-01-07 14:10:28,283 1381 INFO ? werkzeug: 192.xxx.xx.xx - - [07/Jan/2013 14:10:28] "GET /web/webclient/home HTTP/1.1" 404 -
2013-01-07 14:10:37,390 1381 INFO ? openerp.netsvc: Stopping 1 services

```

For clarification purpose, the IP address 192.xxx.xx.xx corresponds to the client trying to access openerp over the network and receiving the "No handler found" message. A try on another client has had the same result.

Why the two CRITICAL lines? And why couldn't it load module Web when it wasn't a problem an hour before? It tells me the sale\_order module doesn't exists but it does.

Some resolution says to add the path to the addons folder into the openerp-server.init file. But why would I do this when it didn't ask for it an hour before? Also it is mentioning an openerp-web project, which apparently turns into an openerp-web folder under addons once installed, and should be specified into the addons path. I currently do not have this folder and never needed it before, so I don't believe I am on the right path to solve my problem here.

Has anyone got any idea? This makes absolutely no sense to me.

Thanks for the help.