Convert xml to gdml

[Number042]

Dear ROOT Experts,

I need to combine different geometries on a GDML level to provide a full geometry for tracking in Geant4. Now, part of the geometry was provided to me as an xml file which probably has to be converted to gdml as a first step. I am pretty sure this conversion is not that difficult, however the following steps didn’t lead to success:

TGeoManager::Import("testGeo.xml");
gGeoManager->Export("testGeom.gdml");

Even though the xml seemed to be imported without error, the export lead to a segfault (invalid pointer). My knowledge of the TGeoManager class and all its methods is not deep enough to know how to proceed. Also, I can’t say anything yet on the integrity of the .xml input but I guess it should be ok. If that is a potential issue, I could check it, of course.

I was hoping some of the more experienced users here might be able to help - thanks in advance!

ROOT Version: 6.18/02
Platform: Fedora 30
Compiler: GCC 9.2.1

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[agheata]

Hi,
The procedure you use looks ok, so it would help having the xml file and seeing the stack trace. Cheers.

[Number042]

Hello and thanks for the feedback.
After playing around a bit more and comparing the xml with other xml files (generated and used within ROOT), I have the impression, the xml might indeed be incomplete.

testGeom is in reality already a quite complex geometry. Stack trace can be found below and the xml in the CERNBox: https://cernbox.cern.ch/index.php/s/f29PhcnLpMEz4aI.