Mc Edit 2 Error Unhandled Exception

If i start up Mcedit after 2 minutes and if i try to load the world it crashes with this stacktrace.


Unhandled Exception






Traceback (most recent call last):


File "mcedit2\editorsession.py", line 1643, in viewOffsetChanged (self is a EditorTab)


File "mcedit2\worldview\minimap.py", line 187, in currentViewMatrixChanged (self is a MinimapWorldView)


File "mcedit2\util\raycast.py", line 30, in rayCastInBounds


File "mcedit2\util\profiler.py", line 73, in _wrapper (self is a Profiler)


File "mcedit2\util\raycast.py", line 77, in rayCast


File "mcedit2\util\raycast.py", line 215, in advanceToChunk


File "mceditlib\worldeditor.py", line 831, in getChunk (self is a WorldEditorDimension)


File "mceditlib\worldeditor.py", line 499, in getChunk (self is a WorldEditor)


File "mceditlib\cachefunc.py", line 77, in __call__


File "mceditlib\worldeditor.py", line 477, in _getChunkDataRaw (self is a WorldEditor)


File "mceditlib\anvil\adapter.py", line 922, in readChunk (self is a AnvilWorldAdapter)


AnvilChunkFormatError: [Errno Error loading chunk: KeyError('Key Blocks not found.',)] None: <traceback object at 0x00000233A00C9848>


thanks for help