Cannot count at the context table

If your relationships are valid, why not simply use this?

Calculate 
 (countrows(Project),Filter(Allocation, Allocation[ContractorName = Blank()
))

Do you have relationships configured between the tables?

What columns exist in Project and what relationship do you have configured between Project & Allocation?

Hi Damir85,

Can you please share some dummy data with a similar data structure and expected results? It should help us clarify your scenario and test to coding formula.

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Regards,

Xiaoxin Sheng