Thank you very much for letting me know - I shall investigate workarounds for the intervening time.

I see from the roadmap that flattening of the Modelica.Media library was set to be achieved by July this year and that the Fluid library should be flattenable by November.

I was wondering how work in these areas was progressing, as I would find it very useful to be able to use models containing these components.

Many thanks for all your work so far - although I am a newcomer to Modelica I am very impressed by the OpenModelica set of tools, particularly OMEdit! (In case it is of interest, I found that the nightly-build version allows you to drag-and-drop custom models into other custom models - effectively circumventing the need to make a custom library.)