Calculation View Issue

Hi Experts,

I have created a calculation view which is providing me the condition record number from different pricing tables.

Below is the snapshot of the calculation view :

Before adding Join_3:

The calculation view was working perfectly fine and returning the condition record numbers as below:

However , after a join was added ( Join_3 ) to get the KBETR from KONP table  based on condition record, no values are returned by the calculation view.

After adding Join_3:

Kindly suggest as to why this is happening. Here i have done the join on the values returned by the Union and the KONP table.

Thanks in advance !!