Error: Unable to access jarfile jarFileName.jar file [Windows]


⛔️ Error: Unable to access jarfile jarFileName.jar

If you are trying to open a jar file and it does not work and you even tried to open the jar via command line using Java jar command java -jar jarFileName.jar there here is how you can fix this issue on Windows 10,

  1. Press Windows + R to open Run.
  2. Type appwiz.cpl and press enter to quickly open Programs and Features.
  3. Check if Java is installed. If not go to https://java.com/en/download/ and download and install lastest version of Java
  4. Now try to run the jar again!, it should work!
Some Troubleshooting steps

1. Check Java is installed

C:\Users\Code2care>java -version
openjdk version "11.0.8" 2020-07-14 LTS
OpenJDK Runtime Environment Corretto-11.0.8.10.1 (build 11.0.8+10-LTS)
OpenJDK 64-Bit Server VM Corretto-11.0.8.10.1 (build 11.0.8+10-LTS, mixed mode)

2. Check Java Environment variable is set

C:\Users\Code2care>echo %JAVA_HOME%
C:\Program Files\Android\Android Studio\jre\jre