<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hello Nicolas,<div class=""><br class=""></div><div class="">I had the same problem as you and couldn’t fix it. On the other hand there is a even more efficient way using</div><div class="">ImageRegionalizedVolume. It will further speed up the simulation especially if your geometry has a lot of common voxel</div><div class="">and you will get rid of this warning.</div><div class=""><br class=""></div><div class="">Cheers,</div><div class=""> Maxime </div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 10 Feb 2017, at 14:41, Triltsch, Nicolas <<a href="mailto:nicolas.triltsch@tum.de" class="">nicolas.triltsch@tum.de</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
<meta http-equiv="content-type" content="text/html; charset=utf-8" class="">
<div bgcolor="#FFFFFF" text="#000000" class=""><p class="">Hello,</p><p class="">I tried to speed up my simulation by choosing Regular
Parameterization (with flag skipEqualMaterials to 1) instead of
Nested Parameterization, because my Volume got a lot of voxels
with the same material. It did indeed speed up the simulation by a
factor of 15, but some projections of my CT simulation failed
(error: segmentation fault; crash).</p><p class="">Now I saw that during the initialization phase of gate it states
the following: <br class="">
</p><p class=""><i class="">### WARNING ### setSkipEqualMaterials at false !! The Geant4
method is not safe since the release 9.5 - Need to be fixed</i><br class="">
<br class="">
</p>
I am pretty sure that this warning is somehow connected to the
warning. Does anyone know if there had been a bug fix for Geant4
v10.2.2?<br class="">
<br class="">
In the appendix there is a screenshot of the error.<br class="">
<br class="">
Cheers,<br class="">
Nico<br class="">
<pre class="moz-signature" cols="72">--
B.Sc. Nicolas Triltsch
Masterand
Technische Universität München
Physik-Department
Lehrstuhl für Biomedizinische Physik E17
James-Franck-Straße 1
85748 Garching b. München
Tel: +49 89 289 12591
<a class="moz-txt-link-abbreviated" href="mailto:nicolas.triltsch@tum.de">nicolas.triltsch@tum.de</a>
<a class="moz-txt-link-abbreviated" href="http://www.e17.ph.tum.de/">www.e17.ph.tum.de</a></pre>
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