Problem in Dax and Relationship

Hi All,

Thanks Advanced !!!

Problem : I was getting value like cross join when connecting three tables. This prob is occurs when i was replace Isblank  with 0 in DAX Measure. 

Importance : Please help me . Its crash my all previous projects also. Really am in big trouble. What is the solution for this ?

1. RelationshipSalary from Employee Table - Direct columnSalary from DAX Calculation

If i remove the Isblank condition its working fine for me.