Direction of incoming particles

Hi André,
So I had a look at the manual and at some forums and I think BXDRAW should be fine for me. I added the following line to my input file:
USERDUMP 100. 21. 2. 0. OutFile
I attach here my mgdraw.f (I couldn’t open the mgdraw.f you shared, link not found).
So the run finishes with no apparent problem but I get a huge binary file (15G) and I am not sure how to access the results. I guess it can be opened with Flair but I am actually looking to get an ASCII file with all needed data inside.
Your help is highly appreciated, also if you can look at my mgdraw.f.
Many thanks,
mgdraw_yas.f (14.5 KB)