[amelia] Problem with logs

Dear all, Amelia works fine when I do NOT specify any variables that should be logged. As soon as I include logs, I get an error ("#Error in matrix(unlist(value, recursive = FALSE, use.names = FALSE), nrow = nr, : negative extents to matrix"). I checked that the variables to log can be logged (no negative/zero values). I'm grateful for any hints. Best, Nicole --Rcode-- #load MI package require(Amelia) set.seed(1000) #load data set load(url("http://schreiberin.de/nicole.Rdata")) n <- nicole dim(n) #3822 59 class(n) #"data.frame" # Declare variables to be logged vlogs <- c("GDP_const2000" , "GDP_curr" ,"population" , "lifeexp" ,"infmortality" ,"trade" , "l_US_fdi_total" , "l_US_fdi_petrol" , "l_US_fdi_total_manuf","l_US_fdi_food" , "l_US_fdi_chemical" , "l_US_fdi_prim_fab_metal" ,"l_US_fdi_machinery", "l_US_fdi_electrical" , "l_US_fdi_transport" ,"l_US_fdi_whole_trade", "l_US_fdi_depository" , "l_US_fdi_finance_except" ,"l_US_fdi_mining" , "l_WB_FDI_percentGDP" , "l_WB_FDI_curr" , "l_UN_FDI_flow" , "l_UN_FDI_flow_pgdp" , "l_UN_FDI_stock", "l_UN_FDI_stock_pgdp" ) amelia.out <- amelia(n, m=5, ts="year", cs="country",intercs=TRUE,polytime=1,logs=vlogs) #Error in matrix(unlist(value, recursive = FALSE, use.names = FALSE), nrow = nr, : negative extents to matrix --END Rcode-- -- Nicole Janz, PhD Cand. Lecturer at Social Sciences Research Methods Centre 2012/13 University of Cambridge Department of Politics and International Studies www.nicolejanz.de | nj248(a)cam.ac.uk | Mobile: +44 (0) 7905 70 1 69 4 Skype: nicole.janz