Hi,
maybe use piping and pipe in a txt file with one empty line. So create a new txt file which contains one line (simply press enter once in the txt file) and save it in some folder with some name. Then when you call your Trnexe.exe pipe in that file by using:
Trnrun = ['Trnexe.exe ',Deckpath,Deckname, '<C:\some_folder\some_file.txt'];
system(Trnrun)
So when the application wants in input it doesn't use STDIN it uses one line of the txt file. This basically simulates the enter press. Let me know if that works for you.
