Need Help with Isotrim (subsurface is invalid because the trimming v domain is singular)

Hello,

I have been trying to divide a surface using isotrim, but I keep getting the error message: subsurface is invalid because the trimming v domain is singular. I looked on other forum pages however their responses are not clear. Can anyone Kindly help with this?

The surface I am dividing is from rhino

I know that the issue is with the v domain but I don’t fully understand the problem and don’t know how to fix it.

Any help would be greatly appreciated.

As Dowazura, added but without comment, the isotrim component uses a domain and not a single value.
Further more, you can use other domain components, so that you can control the upper and lower limits of both your U and V domain range.

Oh I see the issue now. Thanks a lot for your guys’ help.