[R] plm package, random effects model error message

[londonphd]

Hello,

I am trying to run the following Random Effects panel model in R, but I am
getting an error message. I am just thinking, maybe the random.method I
chose is not working?

re1=plm(gdp ~ fossil+renewables+labour+gfcf, model = "random", data =
new.frame,index = c("id"),random.method = "swar")
Error in if (sigma2$id < 0) stop(paste("the estimated variance of the",  : 
  missing value where TRUE/FALSE needed

Any suggestions would be helpful!



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