Struct contents reference from a non-struct array object.

[kostrykin]

I'm trying to reproduce the segmentation masks for the GOWT1 datasets which were used for the results reported in the paper. I have followed the steps described in the README.md.

In demo_test_tracker.m I have accordingly changed the line

dataset = 'Fluo-N2DL-HeLa';

to

dataset = 'Fluo-N2DH-GOWT1';

When running demo_test_tracker(), I get the following output:

>> demo_test_tracker()
Building with 'g++'.
Warning: You are using gcc version '9.3.0'. The version of gcc is not supported. The version currently
supported with MEX is '4.9.x'. For a list of currently supported compilers see:
http://www.mathworks.com/support/compilers/current_release. 
> In bia.compile (line 10)
  In demo_test_tracker (line 9) 
MEX completed successfully.
Normalizing: Fluo-N2DH-GOWT1-01Warning: figure JavaFrame property will be obsoleted in a future release. For more information see the
JavaFrame resource on the MathWorks web site. 
> In bia.plot.fig>fullscreen (line 103)
  In bia.plot.fig (line 89)
  In bia.datasets.import.ctc (line 72)
  In demo_test_tracker (line 18) 

Starting pass 1::1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 
Starting pass 2::1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 
ims saved in: data/datasets/Fluo-N2DH-GOWT1-01-norm.mat
gt saved in: data/datasets/Fluo-N2DH-GOWT1-01-GT.mat
Track processing finshed at: 44.92 sec
Normalizing: Fluo-N2DH-GOWT1-02Warning: figure JavaFrame property will be obsoleted in a future release. For more information see the
JavaFrame resource on the MathWorks web site. 
> In bia.plot.fig>fullscreen (line 103)
  In bia.plot.fig (line 89)
  In bia.datasets.import.ctc (line 72)
  In demo_test_tracker (line 18) 

Starting pass 1::1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 
Starting pass 2::1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 
ims saved in: data/datasets/Fluo-N2DH-GOWT1-02-norm.mat
gt saved in: data/datasets/Fluo-N2DH-GOWT1-02-GT.mat
Track processing finshed at: 40.29 sec
Normalizing: test-Fluo-N2DH-GOWT1-01Warning: figure JavaFrame property will be obsoleted in a future release. For more information see the
JavaFrame resource on the MathWorks web site. 
> In bia.plot.fig>fullscreen (line 103)
  In bia.plot.fig (line 89)
  In bia.datasets.import.ctc (line 72)
  In demo_test_tracker (line 18) 

Starting pass 1::1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 
Starting pass 2::1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 
ims saved in: data/datasets/test-Fluo-N2DH-GOWT1-01-norm.mat
gt saved in: data/datasets/test-Fluo-N2DH-GOWT1-01-GT.mat
Track processing finshed at: 40.04 sec
Normalizing: test-Fluo-N2DH-GOWT1-02Warning: figure JavaFrame property will be obsoleted in a future release. For more information see the
JavaFrame resource on the MathWorks web site. 
> In bia.plot.fig>fullscreen (line 103)
  In bia.plot.fig (line 89)
  In bia.datasets.import.ctc (line 72)
  In demo_test_tracker (line 18) 

Starting pass 1::1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 
Starting pass 2::1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 
ims saved in: data/datasets/test-Fluo-N2DH-GOWT1-02-norm.mat
gt saved in: data/datasets/test-Fluo-N2DH-GOWT1-02-GT.mat
Track processing finshed at: 35.37 sec
Warning: figure JavaFrame property will be obsoleted in a future release. For more information see the
JavaFrame resource on the MathWorks web site. 
> In bia.plot.fig>fullscreen (line 103)
  In bia.plot.fig (line 89)
  In bia.datasets.import.ctc_fluo_hela_aug (line 11)
  In demo_test_tracker (line 19) 
Fluo-N2DL-HeLa-01
Warning: data not found at: data/datasets/Fluo-N2DL-HeLa-01-GT.mat 
> In bia.datasets.load (line 68)
  In bia.datasets.import.ctc_fluo_hela_aug (line 16)
  In demo_test_tracker (line 19) 
Warning: data not found at: data/datasets/Fluo-N2DL-HeLa-01-norm.mat 
> In bia.datasets.load>load_ims (line 353)
  In bia.datasets.load (line 82)
  In bia.datasets.import.ctc_fluo_hela_aug (line 16)
  In demo_test_tracker (line 19) 
Warning: data was not loaded for: Fluo-N2DL-HeLa-01 
> In bia.datasets.import.ctc_fluo_hela_aug (line 18)
  In demo_test_tracker (line 19) 
Fluo-N2DL-HeLa-02
Warning: data not found at: data/datasets/Fluo-N2DL-HeLa-02-GT.mat 
> In bia.datasets.load (line 68)
  In bia.datasets.import.ctc_fluo_hela_aug (line 16)
  In demo_test_tracker (line 19) 
Warning: data not found at: data/datasets/Fluo-N2DL-HeLa-02-norm.mat 
> In bia.datasets.load>load_ims (line 353)
  In bia.datasets.load (line 82)
  In bia.datasets.import.ctc_fluo_hela_aug (line 16)
  In demo_test_tracker (line 19) 
Warning: data was not loaded for: Fluo-N2DL-HeLa-02 
> In bia.datasets.import.ctc_fluo_hela_aug (line 18)
  In demo_test_tracker (line 19) 
creating anchors (kmeans)
#### pid:65767 EXPERIMENT: [1-1] [1-2] ####
#################
Fluo-N2DH-GOWT1:: Class id:1, Rescale: 1.00
Warning: data not found at: data/datasets/v1/Fluo-N2DH-GOWT1-01-GT.mat 
> In bia.datasets.load (line 68)
  In cpn.io.get_imdb>prepare_imdb (line 51)
  In cpn.io.get_imdb (line 20)
  In cpn.train (line 17)
  In demo_test_tracker (line 26) 
Struct contents reference from a non-struct array object.

Error in cpn.io.get_imdb>prepare_imdb (line 53)
        tlist = gt.seg.info(gt.seg.info(:,3)==1,1);

Error in cpn.io.get_imdb (line 20)
    imdb = prepare_imdb(conf, root_cpn_data);

Error in cpn.train (line 17)
    imdb = cpn.io.get_imdb(conf_bb);

Error in demo_test_tracker (line 26)
    cpn.train(opts_cpn, conf_bb, conf_seg);

I'm widely unfamiliar with the code, so a hint on what is going wrong and how to fix it would be very much appreciated.