Memory limit is 32M so that is OK. File_uploads is "on" not "1".

I've just re-read the documentation and found this: 

"The most important PHP setting is called "upload_max_filesize" and is default "2M". This value can either be per directory or per system. While you're in the php.ini file, make sure "file_uploads" is "1".
To further complicate things, there's two more things in the php.ini file that needs consideration (and that may not be per folder, so it's global). The settings "post_max_size" must be greater than "upload_max_filesize", and "memory_limit" should be larger than "post_max_size". So it's not just to up one value to handle large files."

How do I check this? There is no php.ini file in the mod's folder and the only one uploaded to the server was put there by my host.

Interestingly this message only seems to come up with an rtf file. If I try to attach a pdf or jpg I don't get an error message but the new post doesn't show the attachments so it isn't working with these either.

It may sounds boring, but check your "Max filesize" setting for attachment mod, please. Try to upload tiny files.
A.f.a.i.k. too big files doesn't attached without any error messages.

The only tmp folder I can find is in the home folder and that only appears to contain my site stats.

I do have a strange php.ini file in my public folder, placed there by my hosting provider when I was having some problems with my site a few weeks ago but I can't imagine that is the problem.

"File: /home/rosebar/public_html/forum/include/attach/attach_func.php
Line: 107

PunBB reported: Unable to move file from: /tmp/phpWUgyeO to /home/rosebar/attachments/109bb1f4d3a7c9182e9db4f3e1e0d393/541afe8df4f39bb9eab4a48ee7b96416.attach"

Interestingly this message only seems to come up with an rtf file. If I try to attach a pdf or jpg I don't get an error message but the new post doesn't show the attachments so it isn't working with these either.

The attachments folder's permissions are 777. I have just changed the include/attach/attach.func.php to 777 too but that has made no difference.

I have downloaded the attachments folder again (for the third time actually as I'd already thought of this) and this time there is a .htaccess file there. Weird. Anyway, uploading this has made no difference to the error message.

Thanks for persevering!

Does that folder have the right premessions??

And if you download the file agen your see the .htaccess and the readme will tell you where it goes

1. Why am I receiving the following error message when trying to post attachments using the attachments mod?

"An error was encountered
Error: Unable to move file from: /tmp/php6UOwaC to /home/rosebar/attachments/109bb1f4d3a7c9182e9db4f3e1e0d393/e49808f026f0b0e3d06dddc664d05601.attach."

2. What/where is the .htaccess file referred to in the instructions that needs to be placed in my newly created attachments folder? Is the fact that this is missing the reason for the error message above?

Surely someone here has managed to install this mod and is therefore able to help?

I created my new attachments folder in a non-public part of the server and uploaded index.html to it as instructed. However, I'm not convinced I installed the .htaccess file correctly. Could this be the problem? if so, any tips on creating an .htaccess file would be appreciated as my computer hides all files starting with a . making it virtually impossible to find and upload them!

Edit: I think I have now sorted out my .htaccess file problem but this has made no difference, attachments still don't attach themselves to posts or appear in the new attachments folder.

Edit2: On reflection I am still not convinced my .htaccess file is correct. Is this file supposed to be included in the mod's download folder?

I have re-read the instructions and tried to upload a very small test file. This has resulted in the following error message:

"An error was encountered
Error: Unable to move file from: /tmp/php6UOwaC to /home/rosebar/attachments/109bb1f4d3a7c9182e9db4f3e1e0d393/e49808f026f0b0e3d06dddc664d05601.attach."

So there seems to be a problem actually moving the file to the attachments folder which makes me wonder whether this is connected to the .htaccess problem. If anyone can shed any light on the necessary .htaccess file that needs to be uploaded to the attachments folder that would be appreciated as I feel I am close to sorting this out and it would be a pity to give up now.