Whenever I start up Eclipse Juno, it gives me an error saying:
An error had occured. Please see the log file:
C:\\Program Files\\eclipse\\
I was getting the same error while opening the eclipse. to solve that I checked the log file inside the metadata folder. where I found that there is version mismatch of Java. so I have changed the VM inside my eclipse ini file.
-vm /opt/jdk1.8.0_191/jre/bin
Hope this will also help to solve your problem.