TOPIC:

Hello,

I am using STAN to conduct MFA, SFA and EFA therefore I have created 5 layers good, three substances and energy. I was wondering why when I run the model for the 5 layers I get an error message that the calculation was canceled after 100 iterations. However, when I run the model of each level separately (that is switching off the other layers) the calculations work fine and the model runs. Is that normal to happen if I run each level separately instead of all together?

Thank you in advance for your help and support

Nina

These errors are normaly related to division by zero problems caused by e.g. a concentration equation (c = m_substance / m_good) if the unknown mass flow on the layer of goods (m_good) converges against zero during the iterative calculation procedure.