求助！我在做Lee-Carter的SVD分解，出现了如下错误，求助各位大神应该如何解决？

我尝试了interpolate=TRUE还是会报错

> ###transform the data so that it can beuesd in the packages

> age_svd<-c(1:19)

>std.m<-demogdata(m,E,ages=age_svd,years=oldyear,type="mortality",label="China",name="Total",lambda=0)

> ###fit the data with Lee-Carter modelusing SVD

>China<-lca(std.m,years=std.m$year,ages=std.m$age,adjust="dt",restype="logrates")

Error in if (sum(ax < -1e+09) > 0)stop(sprintf("Some %s rates are zero.\n Try reducing the maximum age orsetting interpolate=TRUE.",  :

  需要TRUE/FALSE值的地方不可以用缺少值