*LV Load Procedure Variables from a File
file The names and values of CFS procedure variables will be read from the specified name, and enabled for the current procedure. The variables can then be treated exacly as if they had been assigned with a *&var='value' statement.
C Clear. All variables created previously by the procedure will be erased before executing the *LV statement. Thereafter, only those variables stored in the LV file will be available.
O Overwrite. Variables previously created in the procedure will continue to be available after the execution of the *LV statement. Variables created in the procedure before the execution of the *LV statement with an identical name to those in the LV file will be overwritten by the LV file values.
Standard: If neither of the C|O options are specified, identically-named variables will not be overwritten by the LV file contents.