how to drive a component along a 3D path using Autodesk Inventor

Hi it works as a part, I mean I can drive a point along 3D path, but when I'm trying to create an assembly it gets complicated. I know I have to use Transitional Constrain according to video https://www.youtube.com/watch?v=cjkgEqTpeSk But there is one difference between video and my project. I have a loop, which I think makes the problem. If you have any ideas how to sort it out, please go ahead. Thanks.

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HI I hope this helps :D I tried different ways to constrain the part. I had to stop on the vertical spiral, but I am going to attached what I have done. I added a modification to the track to create new reference points, you don't have to do it to create the points, but I thought it may help to show what I did. This may work on the spiral but I would start a new constrain and animation just for that section.

 
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Wow, it looks great! Thanx, this is exactly what I wanted to get. The only thing is that I can't open your files. This comment comes up: "error in reading RSe stream",
I think it's because we are using differnet versions of Inventor. I have 2014 version.

 
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: ( I will try to take time, to do it on inventor 2014.

 
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I managed to open your files, now I'll try to understand that you did. thanks again for your help

 
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