runtime exceptions...

this is the error I am getting... any suggestions?

module-specific-post-compile:

BUILD FAILED
java.lang.RuntimeException: _repository
at com.intellij.uiDesigner.ant.Javac2.disposeBcel(Javac2.java:262)
at com.intellij.uiDesigner.ant.Javac2.compile(Javac2.java:182)
at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:799)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:306)
at org.apache.tools.ant.Task.perform(Task.java:401)
at org.apache.tools.ant.Target.execute(Target.java:338)
at org.apache.tools.ant.Target.performTasks(Target.java:365)
at org.apache.tools.ant.Project.executeTarget(Project.java:1237)
at org.apache.tools.ant.Project.executeTargets(Project.java:1094)
at org.apache.tools.ant.Main.runBuild(Main.java:669)
at org.apache.tools.ant.Main.startAnt(Main.java:220)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:215)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:90)

Total time: 2 seconds
java.lang.RuntimeException: _repository
at com.intellij.uiDesigner.ant.Javac2.disposeBcel(Javac2.java:262)
at com.intellij.uiDesigner.ant.Javac2.compile(Javac2.java:182)
at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:799)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:306)
at org.apache.tools.ant.Task.perform(Task.java:401)
at org.apache.tools.ant.Target.execute(Target.java:338)
at org.apache.tools.ant.Target.performTasks(Target.java:365)
at org.apache.tools.ant.Project.executeTarget(Project.java:1237)
at org.apache.tools.ant.Project.executeTargets(Project.java:1094)
at org.apache.tools.ant.Main.runBuild(Main.java:669)
at org.apache.tools.ant.Main.startAnt(Main.java:220)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:215)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:90)
_repository