Hello,
the importing parameter IV_BAPIMODE from BBP_PD_SC_UPDATE function module is used, for example, to populate by default some flags (if those flags do not exist in FM calling BBP_PD_SC_UPDATE, as in BBP_SCEC_UPDATE function module).
Indeed, in BAPI mode, if a SAVE is not possible for your SC created using API, a PARK should be done for example.
IV_BAPIMODE is also used in checks, for BORF, etc
So, if you use this function module in any specific report, set this importing parameter.
Regards.
Laurent.