TFREE(<list name>);Returns the value (REAL) of total time in which the list (EL or IL) indicated in <list name> was void.
Example:
Access (I) A,B :: IT := UNIF(5, 7); IF BER(Prob_A) THEN SENDTO(A) ELSE SENDTO(B); Prob_A := (1 + TFREE(EL_A)) / ((1 + TFREE(EL_A)) * (1 + TFREE(EL_A)));