BAPI "BAPI_BUS1077_CHANGE" not workiing as expected....

The business requirment is to update a specification with various characteristic values from an input file. We are using BAPI_BUS1077_CHANGE for this purpose.

This FM Produces desired result if we are trying to modify an existing characteristic value. However this FM fails to update new characteristic value. I am not quite sure on what might went wrong. Can anybody who has previously used this FM or know about this FM, please share your thoughts.

Thanks,

Mohan.