DATE CONVERSION

Hi im having trouble in date conversion. I have a source field DATAB (varchar upon extraction) which is 'DD.MM.YYYY' format.

I need to convert this to 'DDMMYYYY'

but when im using to_date (it becomes YYYY.MM.DD in output) then i used to_char 'DDMMYYY' it gets NULL or error ORA 01722 invalid number. Im using BODS 4 but this code is working fine in BODS 3.