CAST function

[awilly]

Hello All,

I am wondering if something changed with the format clause for the CAST function in BQ as I have run the following statement in the past and it worked.  Now I get this error: 

Failed to parse input timestamp string at 5 with format element 'MM'

SELECT

CAST(col AS DATE FORMAT 'YYYY.MM.DD') AS alias1,

DATE_DIFF(CURRENT_DATE(), CAST(col AS DATE FORMAT 'YYYY.MM.DD'),DAY) AS alias2

FROM `table`

Thanks in advance