Hi,
     I am getting this strange error one in 10 times in my app. The error 
is "<class 'sqlite3.OperationalError'> unable to open database file". I am 
getting this error after i replaced the *databases* folder with one from my 
backup app which is running on a different server. I think the plugin_wiki 
is has some problem. I want to uninstall this plugin_wiki and reinstall it 
but then i fear of losing all the pages that were created using 
plugin_wiki. Can someone help me out on this?

The error traceback is as follows : 

     Traceback (most recent call last):

  File "/backup1/web2py/gluon/restricted.py", line 212, in restricted
    exec ccode in environment
  File "/backup1/web2py/applications/lims/models/plugin_wiki.py" 
<https://metabolomics.iiit.ac.in/admin/edit/lims/models/plugin_wiki.py>, line 
715, in <module>
    plugin_wiki=PluginWiki()
  File "/backup1/web2py/applications/lims/models/plugin_wiki.py" 
<https://metabolomics.iiit.ac.in/admin/edit/lims/models/plugin_wiki.py>, line 
534, in __init__
    code_page = db(db.plugin_wiki_page.slug=='meta-code').select().first()
  File "/backup1/web2py/gluon/dal.py", line 9958, in select
    return adapter.select(self.query,fields,attributes)
  File "/backup1/web2py/gluon/dal.py", line 2245, in select
    return super(SQLiteAdapter, self).select(query, fields, attributes)
  File "/backup1/web2py/gluon/dal.py", line 1704, in select
    return self._select_aux(sql,fields,attributes)
  File "/backup1/web2py/gluon/dal.py", line 1669, in _select_aux
    self.execute(sql)
  File "/backup1/web2py/gluon/dal.py", line 1784, in execute
    return self.log_execute(*a, **b)
  File "/backup1/web2py/gluon/dal.py", line 1778, in log_execute
    ret = self.cursor.execute(command, *a[1:], **b)
OperationalError: unable to open database file

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