SSAS MD Live Connection Error in Columns

Hi All,

I have connected my PBI report with SSAS MD live connection. When i drag a column (Ex: Column1) from a table in table visual, the values shown perfectly. When i drag the same kind of column from another table which has less number of records than column 1 it show error.. I dont know what cause this and i cant explain to my customers without knowing the reason behind. 

If there is no solution for this, atleast i want to know the reason behind it..

Note : i can able to drag both fields in excel and it works perfectly

 Greg_DecklerAnonymousv-qiuyu-msftBaskarAnonymous