The volumevariables derive now from the energyvolumevariables which set the solid propererties needed for nonisothermal models in the new solidstate
Each model now also includes a solidstate (inert or compositional) and each problem a solidsystem.
For nonreactive models the default is set to constant component where properties can be specified in the input file.
The fluidsystems now do not have solid properties anymore. Each solid component now has all thermal properties which might depend on temperature.