Hot Swap doesn't work anymore

Hello everyone

since a short time I can't hot swap my code anymore :(

After editing the code (for example just a string value) I always get this error-msg:

Error:Internal error: (java.lang.IndexOutOfBoundsException) null
java.lang.IndexOutOfBoundsException
at java.io.ByteArrayInputStream.read(ByteArrayInputStream.java:180)
at com.intellij.util.io.CompressedAppendableFile$SegmentedChunkInputStream.read(CompressedAppendableFile.java:541)
at java.io.DataInputStream.readFully(DataInputStream.java:195)
at com.intellij.util.io.PersistentHashMapValueStorage.readBytes(PersistentHashMapValueStorage.java:376)
at com.intellij.util.io.PersistentHashMap.doGet(PersistentHashMap.java:510)
at com.intellij.util.io.PersistentHashMap.get(PersistentHashMap.java:464)
at org.jetbrains.jps.incremental.storage.AbstractStateStorage.getState(AbstractStateStorage.java:117)
at org.jetbrains.jps.incremental.storage.TimestampStorage.removeStamp(TimestampStorage.java:86)
at org.jetbrains.jps.incremental.fs.BuildFSState.markDirty(BuildFSState.java:254)
at org.jetbrains.jps.incremental.fs.BuildFSState.markDirty(BuildFSState.java:230)
at org.jetbrains.jps.cmdline.BuildRunner.createCompilationScope(BuildRunner.java:213)
at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:131)
at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:294)
at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:125)
at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler$1.run(BuildMain.java:232)
at org.jetbrains.jps.service.impl.SharedThreadPoolImpl$1.run(SharedThreadPoolImpl.java:44)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

any ideas?

thx

martin