Update the BR*Tools to the latest supported patch level and see if that helps. I can see there is patch 21 and you are on patch 12.
Check SAP note 2087004 - BR*Tools support for Oracle 12c
BR*Tools 7.40 - full support for Oracle 12c with regard to functions to date plus support for the new features of Oracle 12c. The prerequisite for this is Patch 14 or above. BR*Tools 7.40 can be used with all SAP kernel versions for which Oracle 12c is released.