Skip zero values in conversion or transformation file

Hi colleagues,

I'm loading transactional data to BPC from a flat file,

My goal is NOT to load the lines that have zero balance,

I tested with the IF statement on the Mapping field of SignedData.

Also with a Conversion File of SignedData as show bellow

EXTERNAL  INTERNAL FORMULA

0                 *skip

0.0              *skip

0.00            *skip

0,000          *skip

but has not given me results

Thanks.

Regards,

Eng. Martin D. Novachig