Thank you for your reply.
As you said, I’m using Windows.
(I should tell it when I posted here…Sorry.)
I tried it below command on command prompt.
Then the Debug message was shown.
qcad.exe 1>log 2>&1
cat log
Thank you.
NOTE : The command “cat” was not worked.
… I didn’t know well about standard stream.
So I searched a little about above command,
I could know “type” is the command on the Windows command prompt to show output.