[Gate-users] error :Voxelized source

[Sonal Ambwani]

hello gate-users,

I am trying to run the voxelized phantom of the hoffman brain given in 
the gate examples and this is the warning that i am getting.

GateGeometryVoxelInterfileReader::ReadFile: WARNING: voxel not added 
(material translation not found); value: 5
GateGeometryVoxelInterfileReader::ReadFile: WARNING: voxel not added 
(material translation not found); value: 2
GateGeometryVoxelInterfileReader::ReadFile: WARNING: voxel not added 
(material translation not found); value: 2
GateGeometryVoxelInterfileReader::ReadFile: WARNING: voxel not added 
(material translation not found); value: 1


Can someone tell me what the problem is? Is it related to the warning
I/O warning : failed to load external entity "Materials.xml"
    GateMaterialDatabase: did not find the Materials.xml file: no 
properties read for material 'Water'
      This is only a problem when OPTICAL PHOTONS are transported in 
this material.'

Please help.
Thanks,
Sonal