cannot open the connection error with parLapply

Question

I successfully processed some data on a 4 core computer using parLapply, using a code like below:

require(\"parallel\")
setwd(\"C:/...\")

file_summary<-read.         


        

Answer 1

You need to pass the current directory as an argument in parLapply() to your function. Inside your function myfunction you need to reset the working directory by setwd():

myfunction = function(k, wd_)
{
      setwd(wd_)
        ...
}
...
wd_ = getwd()
Results <- parLapply(Cl, c(1:n_tasks), myfunction, wd_)

N.B. make sure R/R Studio/R Script all are not blocked by the firewall.