In this example, I’ll explain how to solve the problems when trying load an R package due to rJava.įor this, you have to download and install the 64-bit version of Java on this page: Download Java 64-bit version for Windows. Hence, it is necessary to manually install the 64-bit version.Įxample 2: Fixing the Error: JAVA_HOME cannot be determined from the Registry Note that the Java download page suggests the 32-bit version by default. You may have installed a 32-bit version of Java or you might not have installed Java at all. The reason for this usually is that you are using a 64-bit version of R, but not a 64-bit version of Java. So why does the error message “JAVA_HOME cannot be determined from the Registry” occur when we are trying to install the rJava package? R tries to install the rJava package as well, when we are installing the xlsx package. After following the info posted here I was able to successfully install the Java SDK. All users who need to install Java can download it from. However, this problem does not occur because of the xlsx package, but because of the rJava package. Some Mac users require installing Java in OS X El Capitan, perhaps. # Failed with error: 'package 'rJava' could not be loaded'Īs you can see, the error “JAVA_HOME cannot be determined from the Registry” was returned to the RStudio console after installing and loading the xlsx package. Did you re-install rJava Generally speaking you need to re-install all packages when switching R versions (except if the only change is in the patch level z, where the version number is x.y.z, you can usually use the old version).
# error: JAVA_HOME cannot be determined from the Registry onLoad failed in loadNamespace() for 'rJava', details:
Install.packages("xlsx") # Install & load xlsx onLoad failed in loadNamespace() for 'rJava', details: # call: fun(libname, pkgname) # error: JAVA_HOME cannot be determined from the Registry # Failed with error: 'package 'rJava' could not be loaded' Library ( "xlsx" ) # Loading required package: xlsx # Loading required package: xlsxjars # Loading required package: rJava # Error. packages ( "xlsx" ) # Install & load xlsx
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