<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">Hi all,</span><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">Recently I am using FLASH to simulate proton images. I have already run a simulation and generated a 3D check point file. And I tended to use proton imaging unit and let a proton beam pass through the simulation region of the check point files. If everything’s ok, I can obtain a txt file which records proton’s position.<br class=""><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">But now, I can only obtain an empty file, I don’t know how to fix it. </div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">Thank you for your help, and<span class="" style="font-family: Calibri, sans-serif;"> any suggestions would be greatly appreciated.</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">This is the setup of protonimaging:</div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="margin: 0px; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue";">./setup ProtonImaging -auto -3d -geometry=cartesian -parfile=flash.par -nxb=32 -nyb=32 -nzb=32 +protonImaging --without-unit=physics/Hydro --without-unit=physics/Eos -objdir=astrowjz/protonimaging pi_maxBeams=1 pi_maxDetectors=1 threadProtonTrace=True</div></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); margin: 0px; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue";"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); margin: 0px; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue";"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); margin: 0px; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue";">Best,</div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); margin: 0px; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue";">Wang</div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); margin: 0px; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue";"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); margin: 0px; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue";"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); margin: 0px; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue";"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); margin: 0px; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue";"></div></body></html>