Hi Niel,
I have been using SM5 for some time with attempts with Fluids (and ThermCycle). While many aspects work nice enough, I encounter many issues with initialisation of fluids.
For this I have had to load Modelica 3.2 instead of the bundled package. From what I can see, the bundled package does not include Fluid. Is this correct? I had assumed all the issues I was having were because there were aspect that didn't work nicely with SM. If it is all meant to be working now, I will see if I can follow up issues with Wolfram. - it is a big project.