library(foreach)

library(doSNOW)

registerDoSNOW(makeCluster(4, type = "SOCK"))

getDoParWorkers()

getDoParName()

getDoParVersion()

data(africa)

iterations <- 4

foreach(i = 1:iterations) %dopar% {

amelia(x = africa, m=1, cs = "country", ts = "year", logs = "gdp_pc")

}

######

When I run the foreach loop, I receive the following warning


Error in { : task 1 failed - "could not find function "amelia""


This is a bizarre error because I have loaded the amelia package and can impute data sets fine outside of the foreach loop.  Moreover, if I change %dopar% to %do% to run the imputations in sequence rather than in parallel, the imputations run fine with no errors.  How do I get Amelia to impute one data set (m=1) on each of 4 different processors.  Finally, how do I combine the data sets after imputing them in parallel -- I assume using the ameliabind() function?  How can I do this?


Thanks for all your help.  By the way, I'm new to Amelia, so any help would be greatly appreciated!