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Simple Pump System Fails to Instantiate

Simple Pump System Fails to Instantiate

Hello,
I have created a very simple system with nothing more than two tanks, a pump, and a pipe. When I try and instantiate the model, I receive the following error;
Error: Error occurred while flattening model basicPump
If I remove the pump, the model instantiates without any problems. Is there something that needs to be included in the code for pumps? Have I missed something in the pumps settings? Is there perhaps another application on my computer that could be interfering?
I have attached my model, and my OpenModelica version is 1.9.2+dev (r23970) which was the latest nightly build as of the time of this post.
basicPump.mo
Thank you for any help!

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