Last night I posted post#16, including an attachment in this thread. https://www.physicsforums.com/showthread.php?t=659774 When I first posted the entire post disappeared. I recreated the post a best I could and linked directly (insert picture) to the attachment that was now listed in my control panel. I see this morning that the words of the post are still there but the attachment has disappeared both from the thread and my control panel. Help please.