Scanner Script Generating An Error

Dear Friends,

The following script generates an error. Periodicity is HOUR, Bar Interval is 6 and no of days is 60.This is for Stochastic Momentum Index. Can anybody help me with this?

SET A= SMIK(10,3,3,10,EXPONENTIAL,EXPONENTIAL)

SET B= SMI(10,3,3,10,EXPONENTIAL,EXPONENTIAL)

CROSSOVER(A,B)