Jerky tween at beginning and ending

I just solved this problem on my project!! check that the pivot points are in the same locations across your keyframes!!!

To use Classic tween successfully you must have only one symbol per layer and this should be the same symbol in left and right key.

Here is how to check that:

Click on each key and look at Properties panel to see the name of the symbol in the key. All 3 should be the same.

You must learn to prepare your symbols in advance, before activating Classic tweens.

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First here is how to try and fix this 'glitch':

1. Remove both tweens. Remove the second and third keys from your animation [Shift+F6]. Leave only the first key. Then create new keys again by pressing [F6].

2. Move the character slightly (using the arrow key on the keyboard to make sure you are only moving up) in the second/middle key.

3. Create the Classic tweens again and adjust the custom ease one tween at a time.

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More explanations:

If you have multiple objects and try to tween, Flash/Animate wraps them in an automatically created symbols called Tween (with a sequential number).

These are (in most cases) useless.

You can check your Library and see if you have any automatically generated Tween symbols. If you do, this is an indication that you have initiated tween in a key that did not have a single symbol on it - either had multiple objects or shapes.

In the Library you will see how many times your symbols were used. If there are Tween symbols used zero times, delete those.

After 'fixing' the tween issue with the procedure described earlier, there shouldn't be more than one Tween symbol that has been used. This may be what you had in your first key. If there is such, the count should be 3 as this is how many keys you have.

Rename it to 'girl'.

I would remove the tween and then make sure your keyframes are all aligned with the Align tool. Be sure to select all the frames at once. Then add the tween back.

Hi Clay, yeah 'glitch' is probably not the best term to describe the issue, but I know what the user is talking about.

It is unpleasant and not that uncommon, while the reason for its occurrence can often be unclear.

The issue manifests itself like this: If you have a key at frame 1, then a tween occupying frames 2, 3, 4, 5, 6, 7, 8 and a key at frame 9, the symbol moves smoothly until frame 8 and then lands into frame 9 with a little 'jerky' unevenness.

This is not related to a moved Transformation point. If you convert all frames to keys it is likely that it will disappear.

Could be due to some rounding of coordinates during the X,Y position calculations. Can be a bug.

It has been present since at least CS6, maybe earlier versions have it too.

It may happen more often if you work inside a container and the 0,0 point of that container's coordinate system is far away from where the tweened object is. (the rounding errors seem to get larger away from cenrte)

It may in user's case be related to using camera - a feature which I don't use, but from comments it seems to be adding a layer of unnecessary complications and problems while adding zero functionality to already existing workflows.