[It is a bug in tesseract?] encouter an error message when using cube engine for langauge spanish (spa)

[Johnny ho]

I set the recognition mode to cube.

I want to classify "spa".

I use Tess4J to run tesseract.

Here is the error message

Cube ERROR (ConvNetCharClassifier::LoadNets): output count (121) and class count (122) are not equal
Cube ERROR (CharClassifierFactory::Create): unable to Init() character classifier object.
Cube ERROR (CubeRecoContext::Load): unable to load CharClassifierFactory object from /usr/share/tesseract-ocr/tessdata/
Cube ERROR (CubeRecoContext::Create): unable to init CubeRecoContext object
init_cube_objects(false, &tessdata_manager):Error:Assert failed:in file tessedit.cpp, line 199


Thanks.