benchmarkPET(job#).e######: 

!!! GateMDBFile::LookForElementIndbStream: 
I could not find any section [Materials] in the material database file. 
You should check the database file.
Computation aborted!!!
*** G4Exception: Aborting execution *** 

and benchmarkPET(job#).o######: 

(all normal)...
Tangential nb of submodules: 5
Axial nb of crystals: 5
Tangential nb of crystals: 5
Radial nb of layers: 2
GateMaterialDatabase: did not load properties table for material 'Vacuum'.
This is only a problem when OPTICAL PHOTONS are transported in this material.'
GateGeometryVoxelTabulatedTranslator::ReadFile : fileName: range.dat
nTotCol: 60
imageValue: 1069212174 material: , visible true, rgba(0.5,0,0,1)
GateMDBFile::ReadItem: I could not find the item '' in section [Materials] of the material database. 
GateMaterialDatabase: could not download the definition for ''
GateMaterialDatabase: failed to read the material '' in the database file!
imageValue: 1069212174 material: , visible true, rgba(0.5,0,0,1)
Abort