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Error in .jcall(“RJavaTools”…) when importing large xlsx files in R

Recently I had to read in a folder full of large Excel (.xlsx) files. I did as I usually did and use the xlsx library. However, reading in the largest files produced an error: “Error in .jcall(“RJavaTools”, “Ljava/lang/Object;”, “invokeMethod”, cl, : java.lang.OutOfMemoryError: Java heap space” I don’t know what cause…