Error : .onLoad failed in loadNamespace() for “rJava”, details: call: fun(libname, pkgname) error: JAVA_HOME cannot be determined from the Registry Error: package or namespace load failed for ‘rJava’I tried reinstalling both the Java and the R program with the latest versionsbut still get these errors..May I know how I can resolve this? Thank you very much!
This error is often resolved by installing a Java version (i.e. 64-bit Java or 32-bit Java) that fits to the type of R version that you are using (i.e. 64-bit R or 32-bit R). This problem can easily effect Windows 7 users, since they might have installed a version of Java that is different than the version of R they are using.
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Install 64 bit Java from https://java.com/en/download/manual.jsp.Then in windows cmd runsetx PATH “C:Program FilesJavajre1.8.0_211inserver;%PATH%”(make sure your path is correct).
Then in RStudio runSys.setenv(JAVA_HOME=””)
Now, you should be able to run rJava!!
I got the same error resolved by installing same version of R and Java i.e. 64 bits and manually updating the path i.e. ,
Sys.setenv(JAVA_HOME=”C:/Program Files/Java/jre1.8.0_121″) # for 64-bit version
R for Windows installer installs by default both 32-bit and 64-bit files. Reinstalling R and unticking 32-bit part solved the problem for me.
As mentioned in the r-statistics link cited above, you have to manually download the 64-bit version of Java. If not, then the 32-bit version will be installed.
So, if you have a 64-bit operating system, then ensure that both R and Java are using the 64-bit installs. Otherwise, this problem will persist.
Under Windows 10, first check your (running) R-Version:
R.versionIf you see something like x86_64, a 64-bit version of Java is needed.
Simply downloading and installing the matching Java version (https://java.com/en/download/manual.jsp) solved the problem for me. No reinstall of R needed (as suggested by other users here). There also was no need to set the path explicitly.
This has been killing me and I have tried multiple methods above, it doesn”t work. After, I mix all solution to try and below process works for me.
Install Java for 64 bitRun below code in windows commandsetx PATH “C:Program FilesJavajre1.8.0_171inserver;%PATH%”(please change the address acorrding to your dvm.dll real address)Run below in R studioSys.setenv(JAVA_HOME=””)Then I finally can runlibrary(rJava)library(xlsx)
I faced the same issue and was feeling very down as I couldnt get my analysis done. This worked for me :
uninstall previous versions of Java.
delete rJAVA library from Doc>R>win-library. If you have more than 1 versions of R, make sure you delete rJAVA package from all of them.
install Java based on system requirement (64 bit or 32 bit).
and finally restart R before and after installing rJava package.
If R is 64-bit version make sure to install Java 64-bit version!
If R is x86-bit version make sure to install Java x86-bit version!
You can add INSTALL_opts=c(“–no-multiarch”) to your install_github() call:devtools::install_github(“mne-tools/mne-r”, INSTALL_opts=c(“–no-multiarch”))
For more info: https://github.com/mne-tools/mne-r/issues/5#issuecomment-489588267
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I have installed package “xlsx” in my R, but when try to open the library “xlsx”, it warned that the package load failed
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