is the file you are trying to upload larger than the 8Mb post_max_size?? it is a separate, unique setting from max file upload size…

I quoted your question and this was his response:

What is it you’re trying to upload and how big is it? I set the post_max_size AND upload_max_filesize to 32MB.

attached is a pdf printout of your current phpinfo showing this. 

He sent me a pdf of it, but it’s 2Mb, so can’t upload it here.

OK back to error 999. This means that the server choked and wasn’t able to send back a proper error response. IT points to a server issue. Check your php /tmp folder which is where items are uploaded to initially. One possibility is that it ran out of space part way through the upload attempt and then just failed.

Another place to look would be the php error logs although iof the server failed to respond then they might be empty of anything useful.