Re: "'Vacuum' has no defaults" when ROOT read geometry written in GDML

Hi Andrei,

Thanks for you help, but I have already tried what you have suggested and I still got the same error:

  <material Z="1" formula=" " name="Vacuum" >    <D value="1e-25" />
   <atom value="1.00794" />
  </material>

Any idea?

Thanks,
Xinchun

On Thu, Apr 7, 2011 at 4:08 AM, Andrei Gheata <Andrei.Gheata_at_cern.ch> wrote:

> Hi,
> Define materials like below. If they are made of single elements, do not
> define them as compounds.
>
> Cheers,
> Andrei
>
> <material Z="13.0" name="ALUMINIUM">
> <D value="2.7"/>
> <atom value="26.98"/>
> </material>
> <element formula="IRON" Z="26.0" name="FE">
> <atom value="55.847"/>
> </element>
> <element formula="NICKEL" Z="28.0" name="NI">
> <atom value="58.71"/>
> </element>
> <element formula="CHROMIUM" Z="24.0" name="CR">
> <atom value="51.998"/>
> </element>
> <material name="IRON(COMPOUND)">
> <D value="7.8"/>
> <fraction ref="NI" n="0.099"/>
> <fraction ref="FE" n="0.703964"/>
> <fraction ref="CR" n="0.197"/>
> </material>
>
>
>
> On 04/06/2011 06:41 PM, Xinchun Tian wrote:
>
>> Hi,
>>
>> I defined "Vacuum" as following:
>>
>> <materials>
>> <element Z="1" formula="Vacuum" name="videRef"> <atom
>> value="1"/></element>
>> <material formula=" " name="Vacuum">
>> <D value="1.e-25" unit="g/cc"/>
>> <fraction n="1.0" ref="videRef"/>
>> </material>
>>
>> <volume name="vCornerCutoutExtruNDOSV">
>> <materialref ref="Vacuum"/>
>> <solidref ref="sCornerCutoutExtruNDOSV"/>
>> </volume>
>>
>> When ROOT read this geometry, I got "'Vacuum' has no defaults", what
>> does that mean and how to solve it?
>>
>> I also played with "Lead" which gives the same message.
>>
>> Thanks,
>>
>> Xinchun
>>
>>
Received on Thu Apr 07 2011 - 15:49:24 CEST