Im new to this, and need some help.
I am export hair guide from maya to houdini (alembic file). I simulate the dynamic in houdini and export back to maya (alembic file), but in maya i have broken hierarchy. All guide shapes in one group. Hove i can fix this and partiton spline?
Thanks for your help, and sorry For My Bad English

You need to make sure that you have a name attribute, this can be accomplished with a nameSop, set to “name by group” under group, use the wildcard * under group name (in your case, probably piece*), enter one of your group names, under the name field, enter the exact same thing. This will propagate any of your Houdini groups into a name attribute.(You can verify in details/spreadsheet view)

One important thing is that the NameSop appears to want to be the last sop on your chain before your rop, and needs to be clicked on

Keep your partition as is but set the format to hd5 or whatever…not in front of Houdini. You can use Ogawa but you need to download the lates alembic importer for mental ray

Thank you. It is now clear but there is another problem. In the name of the inserted “asterisk” instead of the name grupy

You have “name from group clicked off”, turn that on, and in there, only put the wildcard * <<< for all groups

Under group name, don't actually use a wildcard,just one of the group names in it full name and use the sam exact thing in the name section, i.e my_group_001, not my_group_*

Look in the details view, you should see all your groups propagated to the name attribute.