# Get grids intesections **URL:** \ **Category:** Revit\ **Tags:** revit, geometry, dynamo\ **Created:** [January 15, 2020, 6:01pm UTC](https://forum.dynamobim.com/t/get-grids-intesections/45592 "2020-01-15T18:01:57Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![LievX](https://avatars.discourse-cdn.com/v4/letter/l/7ea924/32.png) [@LievX](https://forum.dynamobim.com/u/LievX)\ **Post date:** [January 15, 2020, 6:01pm UTC](https://forum.dynamobim.com/t/get-grids-intesections/45592/1 "2020-01-15T18:01:57Z")
Hi guys, I am having some trouble and can’t get to solve it, a couple of weeks ago this routine was working fine, but today I tried it and it gave me nothing… when I opened the .dyn file I saw that the List.RemoveIfNot node is not working as I expected… I am getting an empty list… any ideas? thank you! ![columns at grids](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/a/7/a75d076fc2e2f75d629b2a85c18f095dfe231fe6.png) ---
**Author:** ![SeanP](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/seanp/32/42560_2.png) [@SeanP](https://forum.dynamobim.com/u/SeanP)\ **Post date:** [January 15, 2020, 6:12pm UTC](https://forum.dynamobim.com/t/get-grids-intesections/45592/2 "2020-01-15T18:12:30Z")
Check to see if this post gets you going. > [@RemoveIfNot Double](https://forum.dynamobim.com/t/removeifnot-double/18607/2): > > It appears to be a bit wonky… Try the other method I posted and see if that works. ---
**Author:** ![LievX](https://avatars.discourse-cdn.com/v4/letter/l/7ea924/32.png) [@LievX](https://forum.dynamobim.com/u/LievX)\ **Post date:** [January 15, 2020, 6:18pm UTC](https://forum.dynamobim.com/t/get-grids-intesections/45592/3 "2020-01-15T18:18:53Z")
hi @SeanP yes, that was my plan B, to filter with a bool mask, I would prefer to use the List.RemoveIfNot node, because that is the one that the office used on some other routines, but, in this one it appears not to be working… I will try it in the other routines, thank you