QUIT ;
Use the QUIT statement to exit PROC IML. If a DATA or PROC statement is encountered, QUIT is implied. The QUIT statement is executed immediately; therefore, you cannot use QUIT as an executable statement (that is, as part of a module or conditional clause). However, you can use the ABORT statement as an executable statement.
PROC IML closes all open data sets and files when a QUIT statement is encountered. Workspace and symbol spaces are freed up. If you need to use any matrix values or any module definitions in a later session, you must store them in a storage library before you quit.