Wondering if there is a preference I can select to ensure the warp tool result matches the smooth red preview outline Illustrator generates (which I have seen on online tutorials) as mine creates sharp corners? Before and after files of a simple closed path rectangle attached.
After scouring the web I was expecting something smooth and simple like this: https://www.youtube.com/watch?v=ZGD963pBV9M
Oddly, today the warp tool works smoothly and I can’t delete the original post — the “… More” button simply shows an empty lozenge — although keen to see what caused the original result, for future reference.
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You have probably experienced a temporary corruption of a kind that can be healed by simply restarting the application/computer one or more times; there are more serious corruptions that require more.
Or, if you have started over in a new document and (only then) succeeded, you may have experienced a corruption of the original document, in which case you might have been able to copy the artwork to a new document and have it behave.
Both are known causes of wrong/strange behaviour.
None of us can delete posts, except for Adobe staff.
Recently, the More option of editing a post has been removed for newcomers owing to less nice folk joining the forums and posting bad things, and then bypassing moderation by editing the bad things back in; it will appear when you have used the forums some more.
Apart from that, your describing the issue and its vanishing again can be very helpful for others.