Update of expense_code_combination_id in FA_Mass_Additions Table

We have a custom program to derive the depreciation expense account and update the expense_code_combination_id column in FA_Mass_Additions.  We are converting from 11i to R12.  The update statement is failing to write values into the table; however, no error messaage is being produced.  It is a simple update statement. 

                    UPDATE   FA_MASS_ADDITIONS
                    SET      expense_code_combination_id = v_new_ccid
                    WHERE    mass_addition_id = cur_rec.mass_addition_id
                    AND      book_type_code = cur_rec.book_type_code
                    AND      asset_category_id = cur_rec.asset_category_id;

I have verified the data meets the conditions in where clause.  Can anyone help me with this issue?