R xlsx package error

Question

Error in .jcall(\"RJavaTools\", \"Ljava/lang/Object;\", \"invokeMethod\", cl,  : 
  java.util.zip.ZipException: invalid code -- missing end-of-block

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Answer 1

I had this problem with a file downloaded from the internet using R command line, for an online course. Found that apparently the download mode needs to be set properly as write-binary (wb) since xlsx is basically a binary file (zip). Who knew?

If that's what you did too, re-download the file with the mode set properly; like:

download.file(fileUrl, destfile='./data/sample.xlsx', mode='wb')

Answer 2

The version of java you have installed is likely incompatible with the xslx package. Try replacing your default java with the 64 bit version: https://www.java.com/en/download/faq/java_win64bit.xml.