GenerateToString exception

Already disposed
java.lang.AssertionError: Already disposed
    at
com.intellij.openapi.components.impl.ComponentManagerImpl.getComponent(ComponentManagerImpl.java:215)
    at com.intellij.psi.PsiManager.getInstance(PsiManager.java:48)
    at
org.intellij.idea.plugin.tostring.psi.PsiAdapter.getPsiManager(PsiAdapter.java:50)
    at
org.intellij.idea.plugin.tostring.GenerateToStringContext.getManager(GenerateToStringContext.java:72)
    at
org.intellij.idea.plugin.tostring.GenerateToStringContext.getElementFactory(GenerateToStringContext.java:76)
    at
org.intellij.idea.plugin.tostring.inspection.ClassHasNoToStringMethodInspection.checkClass(ClassHasNoToStringMethodInspection.java:114)
    at
com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.a(LocalInspectionsPass.java:98)
    at
com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.doCollectInformation(LocalInspectionsPass.java:59)
    at
com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:59)
    at
com.intellij.codeInsight.daemon.impl.UpdateThread$2.run(UpdateThread.java:5)
    at
com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:155)
    at
com.intellij.codeInsight.daemon.impl.UpdateThread.a(UpdateThread.java:9)
    at
com.intellij.codeInsight.daemon.impl.UpdateThread.access$100(UpdateThread.java)
    at
com.intellij.codeInsight.daemon.impl.UpdateThread$1.run(UpdateThread.java:0)
    at
com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcess(ProgressManagerImpl.java:45)
    at
com.intellij.codeInsight.daemon.impl.UpdateThread.run(UpdateThread.java:43)