traincascade.exe error:Train dataset for temp stage can not be filled.Branch training terminated.

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I do use traincascade in the opencv training LBP features to produce a classifier, in the training process, there are the following errors: My computer systen is windows7*32; the opencv version is 3.0;The problem has been bothering me for days,tried a lot of methods,still did not solve this problem,if I can help solve this proble I would be grateful!