Help! Transformation point hell

[Neonmeatedream]

I have been stuck trying to create the simplest of tweens, one that took seconds in Flash. 

Basically I have a 2px cube that i want to tween into an extending line by scaling the cube down the way. I set the transformation point in the first keyframe to top centre, create the final keyframe with the TP set top centre as well. Create a classic tween between them and then scale the cube on the final keyframe to the desired length.

However, everytime i then view the tween, the TP moves on the final keyframe rendering the animation useless. 

Why is it doing this and what can I do to enable this simplest of tweens. 

Any help is appreciated. 

[ClayUUID]

You aren't moving the transformation point of the final shape after creating the end keyframe, are you?

[Neonmeatedream]

No. I set it beforehand, before i create the tween. 

[ClayUUID]

It looks like scaling is buggy when the transform factors get into the thousands of percents. I'd recommend using a shape tween instead. Or, instead of scaling a small symbol up, scale a large symbol (the full-size line in your case) down.

[n. tilcheff]

Hi mate,

This article should give you all the answers about T-point and R-point, even to questions that you have not yet asked.

http://flash-powertools.com/understanding-symbol-registration/

Make sure you take the time and watch the video at the end too.