Khicas 1.7.0 on Casio CG50, Matrices crash

[parisse]

Thanks, but the video is unfortunately not very helpful for me. I see that you edit a 3*5 matrix named A, then you enter A in the shell, got the answer, then type 2*A, the answer is displayed in the matrixwriter, then it crashes, but I do not see which key you pressed to get the crash. I check myself a matrix creation A, then 2*A and got everything fine. It might be that your Khicas history is corrupted in some way.
I recommend that you erase your history: from Casio Memory app, erase session.xw. Then run Khicas again, try again to edit a matrix A and see if 2*A raises a crash. If the crash depends on the matrix value, instead of a video, try to report all textually. For example, tell us that A was a 3x5 matrix with value say A:=[[1,2,3,4,5],[0,0,0,0,0],[1,1,1,2,3]] and typing 2*A then pressing twice RIGHT and once UP raises a crash.