Arithmetic using constants in GDML

Hi,

I'm working with defining a geometry using GDML and ROOT. The attached gdml file produced this error:

Error in <TFormula::Compile>: Bad numerical expression : "sz"

when loaded. The problem comes from when I try to use a defined constant in an arithmetic expression:

<define>

   ...
   <constant name="sz" value="100"/>
</define>

<solids>

   ...
   <box aunit="radian" lunit="mm" name="det" x="sz" y="sz" z="2*sz"/>
</solids>

The z="2*sz" causes the error. If I replace this with "2*100", for example, the error goes away.

Is this feature of GDML implemented? Is it implemented within ROOT?

I've attached a gdml file that shows the problem, along with a macro I've been using for testing.

Thank you,
Mark

Mark Messier                                         messier_at_indiana.edu
Department of Physics            http://www.physics.indiana.edu/~messier
Indiana University                                 Phone: (812) 855-0236
Bloomington, IN 47405                                Fax: (812) 855-0440








application/octet-stream attachment: geo.C



application/octet-stream attachment: test.gdml