Hello, I fixed the previous problem (extremely trivial, sorry about that), 
however I have another one. After defining two volumes called vol_tot and 
vol_tpc, I would like to make a booleanDifference and get the 3rd volume, 
called vol_tot. However, nor the elementary entity vol_tot or the physical 
entity physiv_gas are tagged when I look in the ‘visibility’ option, whereas 
vol_env and vol_tpc do appear. 

Here is the relevant part of the code:

n_physv = 1; // physical volumes
vol_tot = newv;

BooleanDifference(vol_tot) = { Volume{vol_env};Delete;}{Volume{vol_tpc};};

physv_gas = n_physv; Physical Volume(physv_gas) = {vol_tot}; n_physv += 1;
Also (I don’t know if it is related) when I print the tag number of vol_tot, I 
get 57. Which I find very strange since there are only two volumes defined 
(vol_env and vol_tpc), so I was expecting to get a tag number 3.

Any help is greatly appreciated.

Best regards,

Sabrina
-- 
Sabrina Zacarias
Institut für Kernphysik
Technische Universität Darmstadt
S2|14 / office 319
Schlossgartenstr. 9

64289 Darmstadt

Office: +49 6151 16 23589

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