# Could not generate a proxy class for class org.gradle.invocation.DefaultGradle trying to run gradle **URL:** \ **Category:** Old Forum Archive\ **Created:** [June 18, 2012, 1:10pm UTC](https://discuss.gradle.org/t/could-not-generate-a-proxy-class-for-class-org-gradle-invocation-defaultgradle-trying-to-run-gradle/1851 "2012-06-18T13:10:00Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![barbieri\_matteo](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/barbieri_matteo/32/467_2.png) [@barbieri\_matteo](https://discuss.gradle.org/u/barbieri_matteo)\ **Post date:** [June 18, 2012, 1:10pm UTC](https://discuss.gradle.org/t/could-not-generate-a-proxy-class-for-class-org-gradle-invocation-defaultgradle-trying-to-run-gradle/1851/1 "2012-06-18T13:10:00Z")
Hi, I’m pretty sure this is a silly problem, but after installing gradle on my production server, if I try to run gradle I got: ```gradle FAILURE: Build failed with an exception. * What went wrong: Could not generate a proxy class for class org.gradle.invocation.DefaultGradle. * Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. ``` And with --debug flag: ```gradle 15:03:58.884 [ERROR] [system.err] * Exception is: 15:03:58.886 [ERROR] [system.err] java.lang.NoClassDefFoundError: org/codehaus/groovy/runtime/StackTraceUtils 15:03:58.886 [ERROR] [system.err] at org.gradle.BuildExceptionReporter.write(BuildExceptionReporter.java:106) 15:03:58.887 [ERROR] [system.err] at org.gradle.BuildExceptionReporter.execute(BuildExceptionReporter.java:73) 15:03:58.887 [ERROR] [system.err] at org.gradle.BuildExceptionReporter.execute(BuildExceptionReporter.java:41) 15:03:58.888 [ERROR] [system.err] at org.gradle.launcher.exec.ExceptionReportingAction.execute(ExceptionReportingAction.java:35) 15:03:58.889 [ERROR] [system.err] at org.gradle.launcher.exec.ExceptionReportingAction.execute(ExceptionReportingAction.java:20) 15:03:58.889 [ERROR] [system.err] at org.gradle.launcher.Main.doAction(Main.java:48) 15:03:58.890 [ERROR] [system.err] at org.gradle.launcher.exec.EntryPoint.run(EntryPoint.java:45) 15:03:58.891 [ERROR] [system.err] at org.gradle.launcher.Main.main(Main.java:39) 15:03:58.891 [ERROR] [system.err] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 15:03:58.892 [ERROR] [system.err] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 15:03:58.892 [ERROR] [system.err] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 15:03:58.893 [ERROR] [system.err] at java.lang.reflect.Method.invoke(Method.java:597) 15:03:58.894 [ERROR] [system.err] at org.gradle.launcher.ProcessBootstrap.runNoExit(ProcessBootstrap.java:50) 15:03:58.894 [ERROR] [system.err] at org.gradle.launcher.ProcessBootstrap.run(ProcessBootstrap.java:32) 15:03:58.895 [ERROR] [system.err] at org.gradle.launcher.GradleMain.main(GradleMain.java:24) 15:03:58.896 [ERROR] [system.err] Caused by: java.lang.ClassNotFoundException: org.codehaus.groovy.runtime.StackTraceUtils 15:03:58.896 [ERROR] [system.err] at java.net.URLClassLoader$1.run(URLClassLoader.java:202) 15:03:58.897 [ERROR] [system.err] at java.security.AccessController.doPrivileged(Native Method) 15:03:58.898 [ERROR] [system.err] at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 15:03:58.898 [ERROR] [system.err] at java.lang.ClassLoader.loadClass(ClassLoader.java:307) 15:03:58.899 [ERROR] [system.err] at java.lang.ClassLoader.loadClass(ClassLoader.java:248) 15:03:58.900 [ERROR] [system.err] ... 15 more ``` What could it be? Thanks Bye ---
**Author:** ![Peter\_Niederwieser](https://avatars.discourse-cdn.com/v4/letter/p/9f8e36/32.png) [@Peter\_Niederwieser](https://discuss.gradle.org/u/Peter_Niederwieser)\ **Post date:** [June 18, 2012, 1:42pm UTC](https://discuss.gradle.org/t/could-not-generate-a-proxy-class-for-class-org-gradle-invocation-defaultgradle-trying-to-run-gradle/1851/2 "2012-06-18T13:42:00Z")
Sounds like a corrupted Gradle installation or environment. For example, maybe you have some old libs lying around in the endorsed libs dir of the JVM installed on the server. Although the latter wouldn’t really explain this particular error. ---
**Author:** ![Peter\_Niederwieser](https://avatars.discourse-cdn.com/v4/letter/p/9f8e36/32.png) [@Peter\_Niederwieser](https://discuss.gradle.org/u/Peter_Niederwieser)\ **Post date:** [June 18, 2012, 1:47pm UTC](https://discuss.gradle.org/t/could-not-generate-a-proxy-class-for-class-org-gradle-invocation-defaultgradle-trying-to-run-gradle/1851/3 "2012-06-18T13:47:00Z")
Some other things to try: - Do a clean build \* Delete the .gradle directory in the project directory - Delete (or temporarily rename) the .gradle directory in the user home ---
**Author:** ![barbieri\_matteo](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/barbieri_matteo/32/467_2.png) [@barbieri\_matteo](https://discuss.gradle.org/u/barbieri_matteo)\ **Post date:** [June 18, 2012, 2:14pm UTC](https://discuss.gradle.org/t/could-not-generate-a-proxy-class-for-class-org-gradle-invocation-defaultgradle-trying-to-run-gradle/1851/4 "2012-06-18T14:14:00Z")
I knew it was a silly problem… \* Delete the .gradle directory in the project directory made it work Thank you Peter! ---
**Author:** ![Francois\_Ritaly](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/francois_ritaly/32/5271_2.png) [@Francois\_Ritaly](https://discuss.gradle.org/u/Francois_Ritaly)\ **Post date:** [September 12, 2014, 8:46am UTC](https://discuss.gradle.org/t/could-not-generate-a-proxy-class-for-class-org-gradle-invocation-defaultgradle-trying-to-run-gradle/1851/5 "2014-09-12T08:46:00Z")
I stumbled upon that very same issue today. In my situation, the error occurred because my build was using Gradle 1.4 and a plugin compiled with Gradle 1.9. Changing the plugin build to use Gradle 1.4 fixed the issue (I couldn’t update the other build to 1.9 for a reason).