Requality

1. Есть проект с двумя требованиями. У требования 01 два фрагмента, у 02 - один фрагмент.
2. Удаляем требование 01.
3. Делаем Undo.
4. Делаем Redo.

Указанные действия осуществляются с помощью тестирующего инструмента, то есть быстро.
Где-то между 2 и 3 действиями возникают ошибки в Error log:

eclipse.buildId=M20120208-0800
java.version=1.7.0_15
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=ru_RU
Framework arguments: -product org.eclipse.sdk.ide -eclipse.keyring D:\EclipseWorkspaces\q7workspace\.metadata\.plugins\org.eclipse.pde.core\org.eclipse.sdk.ide/secure_storage
Command-line arguments: -product org.eclipse.sdk.ide -data D:\EclipseWorkspaces\q7workspace/../aut-org.eclipse.sdk.ide -dev file:D:/EclipseWorkspaces/q7workspace/.metadata/.plugins/org.eclipse.pde.core/org.eclipse.sdk.ide/dev.properties -os win32 -ws win32 -arch x86 -consoleLog -eclipse.keyring D:\EclipseWorkspaces\q7workspace\.metadata\.plugins\org.eclipse.pde.core\org.eclipse.sdk.ide/secure_storage

Error
Wed Apr 03 17:28:55 GMT+04:00 2013
Errors occurred during the build.

++++++++++

Error
Wed Apr 03 17:28:55 GMT+04:00 2013
Errors running builder 'Requality Checkers' on project 'Project04'.

java.lang.RuntimeException: node not found: 6a4f2357-5b56-4350-9b8b-5f8ed48ce06d
at com.unitesk.requality.core.TreeDB.getNode(TreeDB.java:280)
at com.unitesk.requality.eclipse.core.TreesTracker.getNodeByResource(TreesTracker.java:291)
at com.unitesk.requality.eclipse.core.EclipseChecker$1.visit(EclipseChecker.java:31)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:69)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:56)
at com.unitesk.requality.eclipse.core.EclipseChecker.build(EclipseChecker.java:55)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:728)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

++++++++++++++++

eclipse.buildId=M20120208-0800
java.version=1.7.0_15
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=ru_RU
Framework arguments: -product org.eclipse.sdk.ide -eclipse.keyring D:\EclipseWorkspaces\q7workspace\.metadata\.plugins\org.eclipse.pde.core\org.eclipse.sdk.ide/secure_storage
Command-line arguments: -product org.eclipse.sdk.ide -data D:\EclipseWorkspaces\q7workspace/../aut-org.eclipse.sdk.ide -dev file:D:/EclipseWorkspaces/q7workspace/.metadata/.plugins/org.eclipse.pde.core/org.eclipse.sdk.ide/dev.properties -os win32 -ws win32 -arch x86 -consoleLog -eclipse.keyring D:\EclipseWorkspaces\q7workspace\.metadata\.plugins\org.eclipse.pde.core\org.eclipse.sdk.ide/secure_storage

Error
Wed Apr 03 17:28:55 GMT+04:00 2013
Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".

java.lang.RuntimeException: node not found: 6a4f2357-5b56-4350-9b8b-5f8ed48ce06d
at com.unitesk.requality.core.TreeDB.getNode(TreeDB.java:280)
at com.unitesk.requality.eclipse.core.TreesTracker.getNodeByResource(TreesTracker.java:291)
at com.unitesk.requality.eclipse.core.EclipseChecker$1.visit(EclipseChecker.java:31)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:69)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:56)
at com.unitesk.requality.eclipse.core.EclipseChecker.build(EclipseChecker.java:55)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:728)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)