[Gmsh] unrecognized variable loaded from another file using Merge command

[Marco Antolovic]

Hi all,
I'm experiencing a strange behavior with some variable after loading them from an external file using Merge.
The attached files shows an example where the merged file (thermal_data.geo) contains three variables
T0, rho_20 and alpha0
When I run the script T0 and rho_20 are loaded without problems while alpha0  is ignored and the following error is generated: 'prova.geo', line 8 : Unknown variable 'alpha0'
Can someone explain what is happening?
Thanks,
Marco
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