Batch classification for BOM items

Hi ,

I am developing a conversion program to upload the class and characteristics to a BOM item . The class type is a custom class which needs to be assigned to the BOM item along with the class and characteristics value . Is there any FM/Bapi which can create the classtype for the BOM item and assign the class and values . I have tried with the FM 'BAPI_OBJCL_CREATE' but was not successful. Any help would be highly appreciated .

Sanjeev