when i run "rosrun dpptam dpptam",error occured

[SU1997]

*** DPPTAM is working ***

*** Launch the example sequences or use your own sequence / live camera and update the file 'data.yml' with the corresponding camera_path and calibration parameters ***
frames_processed -> 100 %
terminate called after throwing an instance of 'cv::Exception'
what(): OpenCV(4.2.0) ../modules/core/src/matrix_expressions.cpp:23: error: (-5:Bad argument) Matrix operand is an empty matrix. in function 'checkOperandsExist'

and i don't know how to fix it

[SU1997]

i have update the file 'data.yml' correctly

[mississippia]

I got the same problem and I fixed it.
change around line 285 in file /src/SemiDenseMapping.cpp
semidense_mapper->points_ref_im_sd = points_ref_im_sd_init.clone();
semidense_mapper-> image_points_byFocal_sd = image_points_byFocal_sd_init.clone();
semidense_mapper->do_init_semi=0;
cv::Mat& dm = semidense_mapper->depth_map;
dm = cv::Mat::zeros(dm.rows,dm.cols,dm.type());

             //       semidense_mapper->depth_map = semidense_mapper->depth_map*0;
                    
                    cv::Mat inv_depths_borrar = semidense_mapper-> inv_depths.clone();
                    cv::Mat depth_map_points_tracked = cv::Mat::zeros(dm.rows,dm.cols,dm.type());
                    cv::Mat variance_points_tracked = cv::Mat::zeros(dm.rows,dm.cols,dm.type());
                    cv::Mat points3D_tracked = semidense_mapper->points3D_tracked.clone();
                    cv::Mat points_aux(0,points3D_tracked.cols,CV_32FC1);

problem comes from "= semidense_mapper->depth_map*0;"
there are a lot of places(more than the place i just typed) that has "cv::Mat/*0", all considered wrong.
replace them with cv::Mat::zeros() function, then the project will work.

that's my testing scene.