[General] utmost necessity

[goodstudent]

"Thank you for the complements, it is of utmost necessity"

What does utmost necessity mean?

 

[MikeNewYork]

It means that something is urgent and important. It does not work in your sentence (without supporting context). In addition, your sentence is a comma splice -- two independent clauses separated by only a comma.

Learning the genetic basis of cancer is of utmost necessity.
Solving the unemployment problem is of utmost necessity.

 

[Tdol]

What are the complements here?