Input array is not a valid matrix in function cvPointSeqFromMat

[famunir]

Hello,

I am trying to debug the project on ICDAR 2013 dataset. When I run the project, the project exits with code 134 (interrupted by signal 6: SIGABRT) with following error

file /home/opencv-2.4.11/modules/imgproc/src/utils.cpp, line 54
terminate called after throwing an instance of 'cv::Exception'
what(): /home/opencv-2.4.11/modules/imgproc/src/utils.cpp:54: error: (-5) _Input array is not a valid matrix in function cvPointSeqFromMat

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The error appears only for few images.

Simulation Setup:

1. First, I tried to run the project with default parameters
   int edgeThreshold = 12;
   int kMin = 9;
   int kMax = 11;
2. Then I changed the parameters as followed:
   int edgeThreshold = 13;
   int kMin = 4;
   int kMax = 10;
   Changing the parameters solved the issue for few images. However, for some other images the same problem arose.

Can anybody help me with this?

Additional Info:
When I change int kMin = 4 and int kMax = 10, execution gives same error for different images. I think this problem occurs when "regionSet.size()==0" defined in FastTextLineDetector.cpp is null. But I have no idea that why it goes empty.

Thanks!