[Peter Kmeť]

You can use simple script for this. (copy code below to text aditor and save it as .jsx)

var selectedItems = app.project.selection;
for (var i = 0; i < selectedItems.length; i++) {
    var item = selectedItems[i];
    if (item instanceof FootageItem && item.file !== null) {
        var originalFilename = item.file.displayName;
        item.name = originalFilename;
    }
}

In After Effect go to File – Scripts – Run script file – and open document you just created.
It will restore names of all selected items in project panels.

Original filename is stored in metadata but sadly After Effects dont have build in function to restore it.

[Peter Kmeť]

Hi
I had the same problem with Cinema few days ago, but i solved it.
It looks like cinema saving positions of individual particles into own .c4d file. – its took forever and file has fenw gigabytes- It is some kind of error on maxon side i suppose. Before saving, just refresh playhead at frame 0 – you have no borned particles, so you can save file easily.
Also i recomend using of thinking particles or houdiny / you can gou further and faster 🙂

[Peter Kmeť]

Hi Pat

I had the same issue, but i findout the reazon – you can youse only 3points.
here is also tutorial (2nd one):
https://duduf.net/?page_id=169

as you can see, for creating “S” is used 2 IK chains with 3 joints,,,