Summarization for Measure Does not Work

Hi George1973 

you may try 

1st 3_M WoUsg =
VAR FMnCount3 =
    UNION (
        ROW ( "MTV", [-1M] ),
        ROW ( "MTV", [-2M] ),
        ROW ( "MTV", [Sold Prod Qnty] )
    )
RETURN
    SUMX (
        VALUES ( Table[Code] ),
        CALCULATE ( COUNTAX ( FMnCount3, [MTV] ), FILTER ( FMnCount3, [MTV] > 0 ) )
    )

tamerj1 
I think I found an alternative solution. At least for the final purpose, it is more than enough:

Month Usage Sum = 

VAR FMG=ADDCOLUMNS(allselected(C_GOODS[პროდუქციის კოდი]),"Pr_Code",C_GOODS[პროდუქციის კოდი],"3M_Usg",[1st 3_M WoUsg],"12M_Usg",[1st Y_M WoUsg])
VAR Sum12M=sumX(filter(FMG,[12M_Usg]=12),[3M_Usg])
VAR Sum11M=sumX(filter(FMG,[12M_Usg]=11),[3M_Usg])
VAR Sum10M=sumX(filter(FMG,[12M_Usg]=10),[3M_Usg])
VAR Sum9M=sumX(filter(FMG,[12M_Usg]=9),[3M_Usg])
VAR Sum8M=sumX(filter(FMG,[12M_Usg]=8),[3M_Usg])
VAR Sum7M=sumX(filter(FMG,[12M_Usg]=7),[3M_Usg])
VAR Sum6M=sumX(filter(FMG,[12M_Usg]=6),[3M_Usg])
VAR Sum5M=sumX(filter(FMG,[12M_Usg]=5),[3M_Usg])
VAR Sum4M=sumX(filter(FMG,[12M_Usg]=4),[3M_Usg])
VAR Sum3M=sumX(filter(FMG,[12M_Usg]=3),[3M_Usg])
VAR Sum2M=sumX(filter(FMG,[12M_Usg]=2),[3M_Usg])
VAR Sum1M=sumX(filter(FMG,[12M_Usg]=1),[3M_Usg])
VAR Sum0M=sumX(filter(FMG,[12M_Usg]=0),[3M_Usg])

Return
Sum11M

First it calculates the grand total sum for the the months with existing sales and then, I can refer to the SUMS with the second criteria from [12M_Usg].. be it 1, 2,3... or 12..
The final result has been achieved. That's all I wanted! :))) Thanks a lot again1