Hi,
Thanks Ciarán for your help. However, the .lst file doesn't say much more about the errors.
1/ The unit number (24) is not written on the input file. Plus, the associated type changes (and is not in the current simulation in most cases) each time I get this error. Let's forget about this then.
2/ The second error ("a negative flow rate was encountered") has retained my attention (first of all because it stops the simulation) and I would be glad if I could draw your attention on this issue. Please find attached the TRNSYS model and refer to it for unit and type numbers. As you can see I have traced the critical components to better understand the error. Here is what happens :
- During post-convergence call, mass balance is not achieved through the first tee piece (Type 11, Unit 55). Input flow rates are 339,8 kg/hr and 0 kg/hr whereas output flow rate is 339,6 kg/hr (equal to iteration 0 and 1 of the current time step and to the converged value of the previous time step). Right after this, in the lst file, a fatal error is detected (no unit specified), as attached in my previous message. Does it occur at iteration 0 of the next time step? Why is it post-convergence call (current time step) if a simple mass balance is not checked?
Feel free to ask if you need more info about the project,
Thanks a lot for helping me on this,
Have a nice day,
