Error when replacing an existing attachment to a ticket

[mjs AT clemson DOT edu]

I created a ticket which and attached a patch file. Now I want to update this patch file. However, when I try to attach my patch file (which has the same name as before) and mark the box "Replace existing attachment of the same name", then I get the following error:

Oops…
Trac detected an internal error:

If you think this really should work and you can reproduce it, you should consider reporting this problem to the Trac team.

Go to http://trac.edgewall.org/ and create a new ticket where you describe the problem, how to reproduce it. Don't forget to include the Python traceback found below.

TracGuide — The Trac User and Administration Guide
Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/trac/web/main.py", line 406, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.3/site-packages/trac/web/main.py", line 237, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.3/site-packages/trac/attachment.py", line 361, in process_request
    self._do_save(req, attachment)
  File "/usr/lib/python2.3/site-packages/trac/attachment.py", line 496, in _do_save
    attachment.insert(filename, upload.file, size)
  File "/usr/lib/python2.3/site-packages/trac/attachment.py", line 183, in insert
    filename))
  File "/usr/lib/python2.3/site-packages/trac/util/__init__.py", line 112, in create_unique_file
    raise Exception('Failed to create unique name: ' + path)
Exception: Failed to create unique name: /home/coin/Trac/Projects/Osi/attachments/ticket/35/osiglpk.100.patch

[Tim Hatch]

#5377 was very similar and said it was a config error. Is the attachment dir not writable, perhaps?

[sid]

Please see #5377 for the solution that should work, and also check permissions for the attachment dir. No response to suggestions in 3 months, so I'm going to close this. If you have the same problem and new information, please feel free to reopen. Thanks.