data not coming properly

Hi guru's,

I have created a Z datasource using a functional module.

In that there is a field BaseUnitof Measure which is getting populated correctly when i executed it in rsa3.But when it is coming into BW the values are changing for this filed. I have checked in PSA and could not find the reason why this values are changing. There are no selections in that infopackage. The datasource is being used for full load