As part of sas programming, programmers frequently want a clean work library before a program is executed and use proc datasets to clean up the work library using code like the one shown below.
proc datasets library=work memtype=data kill;
In the case when there are no datasets in the work library when the above code is executed, it throws a warning saying that: "WARNING: No matching members in directory.".
We can prevent this warning message by making use of the 'NOWARN' option on proc datasets statement.
proc datasets library=work memtype=data kill nowarn;