Normally if your attachment file is to large based on file permissions you get a message like:
We encountered a problem. The reason reported was
Files can be no larger than 75 Bytes bytes.
Please click back to return to the previous page.
I have set the limit to 75b for this example.
Yes the Bytes bytes echo is a flaw in the language file.
Also you may have edited your mysql.inc.php file to show errors from a previous problem.
Which should be turned back off.
HERE is a post on this subject.
Looking at your post users should never see your paths in a error message.
In fact it is probably to late for you to edit your post but maybe one of the moderators could alter it so we can't see it.Just use the notify option in this topic and request someone to edit your post to mask your absolute path.
But it really looks like the file you are testing is hosed up.
I currently am using 7.5.2 and I think you have a prior 7.2 version but I don't recall a change in this area of the code.
