"A single value column cannot be determined" error in summary table

[hpoyil]

I have a table which contain duplicated date column(table 1).

Table1
ID	Date	column3	columN
1	30 March 2020
2	30 March 2020
3	5 April 2020
...
...
m	1 June 2020

I created Table 2 using 

Table 2 = SUMMARIZE(Table 1, Table 1[Date], "count", COUNT(Table 1[Date]))

Table2
Date	count
30 March 2020	2
5 April 2020	1
..
1 June 2020	5

So, Table 2 will have unique values for Date column. There are missing values in Date column.

Now, trying to create Table 3 to make the Date column continues and put the count column value will be taken from previous date for missing date.

Table3 = 
ADDCOLUMNS(
    CALENDAR(MIN(Table2[Date]), MAX(Table2[Date])),
    "count",
    LOOKUPVALUE(
        Table2[count],
        Table2[Date],
        MAXX(
            FILTER(Table2, Table2[Date] <= EARLIER([Date])),
            [Date]
        )
    )
)

But getting error: "A single value for column in table cannot be determined. This can happen when a measure formula refers to a column that contains many values without specifying an aggregation such as min, max, count, or sum to get a single result"

I assume that, this is because Table2 is a derived from Table1 where Date column contain duplicate values. 

Is there any way to fix this? Please let me know. Thanks in advance.

[v-diye-msft · Accepted solution]

Hi @hpoyil 

The formula works fine on my side, kindly check the attachment:

The error always happens when you're trying to create a measure instead of a calculated column. you might provide the dummy pbix that we can check it further.