User '%1' already has EXECUTE permission

Error constant SQLE_ALREADY_HAS_EXEC_PERMS
ODBC 2 State 42000
ODBC 3 State 42000
Parameter 1 Name of the user ID that already has EXECUTE permission.
Severity 16
SQLCODE –968
SQLSTATE 42WAB
Sybase error code 13522
Probable cause

You attempted to give EXECUTE permission on a stored procedure to a user that already has EXECUTE permission on that procedure.