[amelia] Multicore with parallel option

Dear list, I installed 1.7 from source from the Cran repo to try out parallel imputation. Before 1.7 I did it with foreach mtfs_i <- foreach(i=1:5,.combine="ameliabind",.inorder=F) %dopar% { amelia(mtfs, m = 1, ) } and it worked fine. with 1.7 I tried using multicore using the parallel argument. mtfs_i <- amelia(mtfs, m = 1, parallel = "multicore", # note: this will crash R if tcltk is loaded prior to 2.15.3 ncpus = parallel::detectCores(), ) Both approaches finish without error, but I get a messed-up S3 object. So, in approach 1 using foreach ameliabind complains that it didn't get amelia objects. With approach 2 I get a list of Amelia objects, but the first two items are NULL and I don't get one list $imputations with many imputations, but a stitched-up object. Using this object with e.g. transform or overimpute fails, but doing the same with the third object in the list works (that's just one imputation then though). Regards, Ruben Arslan student assistant Lab: http://www.psychology.hu-berlin.de/profship/perdev Humboldt-University of Berlin Unter den Linden 6 10099 Berlin, Germany