empty Cache when loading another dataset

[daurer]

Traceback (most recent call last):
File "/Users/benedikt/phd-project/software/owl/dataloader.py", line 400, in loadImage
shape = (min(self.imageData[img].shape[0], 8192), min(self.imageData[img].shape[1], 8192))
File "/Users/benedikt/phd-project/software/owl/cache.py", line 24, in getitem
retval = self.dict.pop(key)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/collections.py", line 143, in pop
raise KeyError(key)
KeyError: 3
Traceback (most recent call last):
File "/Users/benedikt/phd-project/software/owl/view2d.py", line 774, in generateTexture
maskData = self.loaderThread.maskData[img]
File "/Users/benedikt/phd-project/software/owl/cache.py", line 24, in getitem
retval = self.dict.pop(key)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/collections.py", line 143, in pop
raise KeyError(key)
KeyError: 2

[daurer]

It seems that when reloading the dataset or loading another one, for a short time, the ImgData and/or MaskData chache is empty.