Cannot attach a file

[anonymous]

Python traceback

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/trac/web/modpython_frontend.py", line 206, in handler
    dispatch_request(mpr.path_info, mpr, env)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 139, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 107, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.4/site-packages/trac/attachment.py", line 267, in process_request
    self._do_save(req, attachment)
  File "/usr/lib/python2.4/site-packages/trac/attachment.py", line 335, in _do_save
    attachment.insert(filename, upload.file, size)
  File "/usr/lib/python2.4/site-packages/trac/attachment.py", line 142, in insert
    os.makedirs(self.path)
  File "/usr/lib/python2.4/os.py", line 156, in makedirs
    makedirs(head, mode)
  File "/usr/lib/python2.4/os.py", line 159, in makedirs
    mkdir(name, mode)
OSError: [Errno 13] Permission denied: '/var/lib/trac/dev/attachments/wiki'

[Emmanuel Blot]

It looks like a configuration issue to me:
Did you check that all the directories under /var/lib/trac/dev/attachments are all writable by your web server?

For example, if you run debian, the attachments/wiki directory should be writable by user "www-data".

Such a misconfiguration often occurs when you first create your environment (with trac-admin) as root or a regular user, while your web server uses a dedicated account to execute.

[Emmanuel Blot]

For example, if you run debian, the attachments/wiki directory should be writable by user "www-data".

Actually, this directory is created by Trac on first attachment attempt, you should check out the permission of the attachments directory.