PPv5.0.1.1713 would accept this code
if(&NCLIENTE,TRUE)
set(&CLIENTE,@(1,81,117))
set(&NCLIENTE, FALSE)
endif
PPv5.2.2.1925 would only accept this.
if(&NCLIENTE)
set(&CLIENTE,@(1,81,117))
set(&NCLIENTE, FALSE)
endif