Dear all, I have a problem reading xlsx files in R. Could anybody help me how to resolve the problem? install.packages("xlsx", dependencies=TRUE) library(xlsx) library(rJava) data <- read.xlsx("3.1.xlsx", sheetIndex = 3.1) data <- read.xlsx("3.1.xlsx", sheetName= "a",as.data.frame=TRUE, header=TRUE) data <- read.xlsx("3.1.xlsx", 1) the error message is : Error in .jcall("RJavaTools", "Ljava/lang/Object;", "invokeMethod", cl, : java.lang.OutOfMemoryError: GC overhead limit exceeded I also have problem in reading Rmpi library. I installed it correctly however when I read it by library(Rmpi) I received an error message: Error : .onLoad failed in loadNamespace() for 'Rmpi', details: call: inDL(x, as.logical(local), as.logical(now), ...) error: unable to load shared object 'C:/Users/Amir/Documents/R/win-library/3.0/Rmpi/libs/x64/Rmpi.dll': LoadLibrary failure: The specified module could not be found. Error: package or namespace load failed for ‘Rmpi’ My many many thanks your help in advance. Best, Amir [[alternative HTML version deleted]]