Not really, because you are not including the library call and properly formatting your code, this would be a correct reprex of your issue.
library(metafor)
yi <- c(1000, 2000)
vi <- c(0.0000001, 1000000000)
res<-rma.uni(yi, vi)
#> Error in rma.uni(yi, vi): Ratio of largest to smallest sampling variance extremely large. Cannot obtain stable results.
Created on 2019-02-06 by the reprex package (v0.2.1)