想用postfile对数据进行转换，代码如下
. clear

. postfile newpost str30 v1 str30 v2 using "C:\Users\Administrator\Desktop\newpost",replace

. use C:\Users\Administrator\Desktop\postf

. post newpost (v1[1]) (v2[2])


结果出现如下错误
v1 not found
post:  above message corresponds to expression 1, variable v1

到底是哪一点出错了呢