Insufficient privilege

Hi, People!

I'm connected in the SAP HANA Studio with the System user and I'm trying to execute the library _SYS_AFL.AFLBFL_MOVINGMEDIAN_PROC but occurred the following error:

Could not execute 'CALL _SYS_AFL.AFLBFL_MOVINGMEDIAN_PROC(BFL_MVMD_VALUE_TBL, BFL_MVMD_LENGTH_TBL, ...'

SAP DBTech JDBC: [258]: insufficient privilege: Not authorized

How can I resolve this problem?