id summary reporter owner description type status priority milestone component version resolution keywords cc 5391 How do I fix the error, “Model is structurally singular, error found sorting equations” KieranF somebody "This is one of the most common errors I receive when working with OpenModelica Software. I already understand how this error is usually triggered; when system parameters are conflicting and disagree with one another. I only recieve this error upon simulation. Leading up to that point, my model is able to be checked and instantiated. I've already tried omitting system parameters that I've deemed not an necessity to my system however nothing seems to fix the error. This was an attempt to get rid of system parameters that might be conflicting with one another. My system is already very simple to begin with. Currently, I'm working on a sub-assembly verification process in order to correctly build a working Rankine Power model. The sub assembly focuses on a (1) of (2) heat exchangers that would be used in a dual HX system incorporating a reheat process in between the High Pressure and Low Pressure turbines. This sub assembly is trying to describe water coming from a pump at a condensed liquid state where it will travel through a heat exchanger ""super heater"" where it will change the state from a compressed liquid to a superheated vapor. This vapor will then be fed into the High Pressure turbine and return into a Pressure Sink. I've already completed a hand calculated thermodynamic analysis of my system and know outlet temperatures and enthalpies. However, these outlet parameters are some of which I chose to remove for I felt I would let the system solve for them instead of telling it what it should calculate. Removing these values to solve the error did not work as well. If you have any thoughts, advice or considerations please let me know! Below I've posted the code to what I have been working on. Thanks again!" defect new high Future *unknown* v1.13.2