Units conversion from PrimeMesh to Fluent

[Schwarz2012]

Hi!

Another day, another problem.
I develop geometry in mm using PyAnsys Geometry (in SpaceClaim), convert it to PrimeMesh, generate a complete cubic grid in mm and save it .cas or .msh files, which are then read into Ansys Fluent, and they are automatically converted to meters, so I got not a 25mm model, but 25m.
What can I do to fix this problem?

Thanks a lot for answers!