Say if you have a lot of geometry in one file sop, some in groups, some not, what expression would I use to select the geometry that hasn't already been grouped in a delete node? Thanks :!:

If you want to delete everything with a primitive group, you can use this in the Group field of a Delete SOP:

`primgrouplist(opinputpath(“.”, 0))`

Or this for point groups:

`pointgrouplist(opinputpath(“.”, 0))`

use Group SOP:
in Create Tab
- uncheck checkbox next to Group Name to not create new one

in Combine Tab
- set Combine Entity to Primitives
- set Group name to like: ungroupped
- click on not equals button next to it
- put * as a group name next to not equals

that would put all primitives that are not in any other prim group to new “ungroupped” group
then Blast or Delete ungroupped group