TIN Editing - Grade from centerline

[DanielKim3]

Hi there,

I am trying to edit my TIN using "Grade from Centerline" tool. However, whenever I hit apply button, I get this error message box (below).
Does anyone know what the issue might be?

Your help would be appreciated.

[DanPatterson_Retired]

What were your settings?

[DanielKim3]

Hi Dan,

Below was my settings. I didn't change anything and used the default settings.