Hi Milena, It looks like a classic example of Java version mismatch. One of the dependencies of cTakes is Java 8 Please make sure you have JAVA SDK installed and not JRE. I have OpenJDK 8 running on my system and cTakes runs fine on my system.
-Bandeep On Tue, Sep 13, 2016 at 2:32 PM, Gianfrancesco, Milena < milena.gianfrance...@ucsf.edu> wrote: > Hello, > > I have just installed cTakes and followed instructions in the 3.2 User > Install Guide. However, I am unable to load an AE. I have a UMLS user name > and password, and have updated the appropriate scripts as outlined in the > User Guide, yet I get this error when trying to load any AE (even the > non-UMLS ones): > > Exception in thread "AWT-EventQueue-0" java.lang.UnsupportedClassVersionError: > org/apache/ctakes/dependency/parser/ae/ClearNLPDependencyParserAE : > Unsupported major.minor version 51.0 > > at java.lang.ClassLoader.defineClass1(Native Method) > > at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) > > at java.lang.ClassLoader.defineClass(ClassLoader.java:621) > > at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) > > at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) > > at java.net.URLClassLoader.access$000(URLClassLoader.java:58) > > at java.net.URLClassLoader$1.run(URLClassLoader.java:197) > > at java.security.AccessController.doPrivileged(Native Method) > > at java.net.URLClassLoader.findClass(URLClassLoader.java:190) > …… + more > > I have double checked that I have the latest Java software. Any idea what > could be causing this error? > > Thank you! > > Milena >