Unable to create tooling split

Hello.

Im trying to create a tooling split for model that i made some design changes for. First time all was alright now i have trouble making the tooling split.

When i try with "INTERLOCK SURFACE" i get error : "Failed creating core and cavity solids" and when i try without: "The parting surface must be larger than the boundary sketch."

Is it because of this holder being having surfaces in both cavity and core ?
The attached screenshots are showing the location.

And here is the model attached.
Best reggards.

As i surpress it i see its from it so can you give me some advice how to make this holder ?

When i try with all tangent shut off faces i get: "cannot knit sheets together"

Message was edited by: Lyubomir Ninov

SolidworksPlastics And Mold Design