Need help.
After I import an alembic, repositioning the points (no blasts or removals) then exporting the alembic. somehow the point count is changing.
Here is an image of the point wrangle node right before Alembic ROP and then after I bring the result in and unpack and convert.

The info panel says there are unconnected points. I believe these are the points that are somehow being removed at export.
I have tried every setting and I still have Houdini export modifying the alembic in ways that are not helpful.

Any help would be appreciated.

If you are exporting using path attribute and unconnected points can have no primitive path they are probably not exported

As a workaround you can connect all unconnected points to particle system primitive using Add Sop and assign desired path attribute to that prim

I did submit this as a but to Sidefx and they gave me a temp workaround that is similar to yours Tomas.
Basically these points just need a path attribute to know how to get packed away into the alembic.

Here is their solution