I want to classify the land cover of a Landsat szene. Therefore I created several feature classes with corresponding polygons (training samples) that represent the various classes, e.g. I have a feature classes with 10 polygons that represent the class "bare soil." When I load this feature class in the training manager, 10 training samples appear in the list. I highlight these trainings samples and then I want to merge them as all these training samples represent the class "bare soil". But anytime I press the button "merge training samples" in the training manager, ArcGis completely crashes. I warning appears that a crictical mistake happend, but no specific information on it.
Does anybody now why this happens and how I could solve the problem?
Many thanks in advance,