Problem 2581

Created attachment 841 [details]
Zip with the image (DimensionError.png) where the error that appears can be seen and the PDB file used for the study that triggers it.

My name is Pablo Álvarez Rodríguez, I am from Asturias, Spain, and I am currently doing my master's thesis in Medical Physics. I would like to use Geant4 for it, and more specifically the extended included module PDB4DNA. I am currently working with the Geant4 Virtual Machine (https://geant4.lp2ib.in2p3.fr/) and I was hoping to ask you about an issue I have encountered with the PDB files. 

The attached image "DimensionError.png" shows an exception thrown by Geant4DNA GUI telling that the dimensions are too small for doing a Solid:Bounding, which I understand as a bounding of the object to simulate.
In this exception, I am loading through Geant4DNA the other attached file from the ZIP.
This 'ALA_ideal.pdb' shows the geometry of the aminoacid Alanine, which is an Alanine *.sdf file from the ProteinDataBank translated into *.pdb file via OpenBabel. The idea was simulating the same as the 1ZBB.pdb example but for  aminoacids, peptides and proteins.

I understand that aminoacids and small peptides may generate exceptions due to them being way smaller in comparison with the DNA strings such as the 1ZBB example. 
My question is if this exception could be solved and how, or I should load the aminoacids and peptides in another way if it couldn't be solved.

Thank you very much.