task12 not working with trelis 17.1, with fix provided

[qingfengxia]

I tested out Trelis 17 does not support command geometric sizing on for openmc_workshop task12
#cubit.cmd('volume all scheme tetmesh proximity layers off geometric sizing on') # Trelis 16.5
cubit.cmd('volume all scheme tetmesh proximity layers off') # Trelis 17.1

Then openmc can start and complete the task

is that safe to just remove that geometric sizing on for trelis 16.5? shall we just remove that geometric sizing on

[shimwell]

Not really sure, is there an equivalent or replacement command in v17