Grants required for DBMS_RECTIFIER_DIFF?

Question

Hello,
can somebody tell me what grants are required to execute the procedure DIFFERENCES inside the sys package DBMS_RECTIFIER_DIFF?
One of our DBAs has already granted me EXECUTE dbms_rectifier_diff, but when I try to run the procedure, I get the following error:
ORA-01031: insufficient privileges
ORA-02063: preceding line from dblink
ORA-06512: at "SYS.DBMS_RECTIFIER_DIFF", line 1628
ORA-06512: at "SYS.DBMS_RECTIFIER_DIFF", line 1219
ORA-06512: at line 3
Besides GRANT EXECUTE ANY PROCEDURE, is there another grant set that we can apply here to be able to use the functionality fo the package?
Regards,
Thomas

Answer 1

here's the statement that should call the procedure:
BEGIN
DBMS_RECTIFIER_DIFF.DIFFERENCES (
sname1 => 'testschema',
oname1 => 'test_diff_one',
reference_site => 'dblink,
sname2 => 'testschema,
oname2 => 'test_diff_two',
comparison_site => 'dblink,
where_clause => '',
column_list => 'column1,column2,pk',
missing_rows_sname => 'testschema',
missing_rows_oname1 => 'missing_rows_data',
missing_rows_oname2 => 'missing_rows_location',
missing_rows_site => 'dblink',
max_missing => 500,
commit_rows => 50);
END;
both tabled contain same columns (of course with different content), have primary keys and so on. the site is the local database I work on.