fsolve returns a complex solution instead of a real one

[Loro51]

Dear All, 

Maybe I am doing something wrong. In this case, please let me know

I develop a simple code to calculate the chemical equilibrium from a
composition at some temperature and on the uploaded file you can find the
equations.

As I run CC_Micro_Turbina_Gas_Trabalho_BE on the Command Window on Debian 9
(Octave version 4.0.3) I get a complex solution with info = 3 instead of a
real solution as it should be. What am I doing wrong?

All the properties were tested and are Ok

All the best


CC_Micro_Turbina_Gas_Trabalho_BE.m
<http://octave.1599824.n4.nabble.com/file/t373382/CC_Micro_Turbina_Gas_Trabalho_BE.m>
  




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