This warning occurs when Modifier(#) or Reinitializer(*) or Const (@) is specified in a system definition.
%s is the type of system definition.
Remove the reinitializer.
In the above example the system UDF is reinitialised with *. Hence the message warning T0015: Ignored Modifier(#), Reinitializer(*), and Const(@) that are not allowed for system description type 'UDF'. appears.
The code is corrected by removing the reinitializer(*).