rhs dimensions error

[LexiYIN]

Excuse me ,I am so sorry to bother you for the following question as I am a total freshman for matlab.
I have change the data folder to "TestLabels_Sampled_2Classes" , labels = [1,3] and edgeLikFeatOn=false in training process, and then the error come out :
Assignment has fewer non-singleton rhs dimensions than non-singleton subscripts
Error in mlrfsTrain (line 163)
F(:,:,nImageFeatures+1:nImageFeatures+nLabels) = classProbs;
THANK YOU for reply