Bad properties for index 3, char 1: 0,255 0,255 0,0 0,0 0,0

[zjl...@icloud.com]

when training tesseract, I have the problem follows, can you help me?

my font_properties contents as follows

1、tesseract test.testfont.exp0.tif test.testfont.exp0 -l eng 10 batch.nochop makebox

2、tesseract test.testfont.exp0.tif test.testfont.exp0 -psm 10 nobatch box.train

3、unicharset_extractor test.testfont.exp0.box 

4、shapeclustering -F font_properties -U unicharset test.testfont.exp0.tr

I can't solve the problem, if you know, help me ,thank you!