Energyplus not accepting window construction

Hi I’m studying different window constructions for micro climate inside a room .
The below construction gives sever error - Nominal U value is 0. What is the best way to rectify this?

Thank you

Test1.gh (652.4 KB)

Hi @MansiDhanuka,

You have a white space at the end of the name (E304 Window Existing_Thinsulate ). If you delete it, the simulation will run.

Thank you @MohammedAlshayeb