本人在用RATES软件估计时，编了如下程序，可是在运行中，总是提示错误

all 0 1166:1
open data "d\book.xls"
data(format=xls,org=col) / r v
SET h1=0.0
## SX22. Expected Type SERIES, Got REAL Instead
>>>>SET h1=0.0<<<<
set h1=0
## SX22. Expected Type SERIES, Got REAL Instead
>>>>set h1=0<<<<
nonlin a0 a1 a2 a3
frml a1t=r(t)-a0-a1*v(t-1)
## SX22. Expected Type FRML(REAL), Got REAL Instead
>>>>=r(t)-a0-a1*v(t-1)<<<<
望高人指点，不胜感激。。。