Kaldi feature dimension error

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I run the kaldi tutorial for dummies and i get this error "error getting feature dimension".

Can anybody help?

Thank you for your time!

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In addition to what Nikolay said about previous error not appear in the screenshot, this error mostly happened because that the command of creating feats.scp failed to be executed, so check if these 2 commands ran successfully

steps/make_mfcc.sh --nj $nj --cmd "$train_cmd" data/train exp/make_mfcc/train $mfccdir
steps/compute_cmvn_stats.sh data/train exp/make_mfcc/train $mfccdir