errors in vensim

[akar_a_ko]

I managed to create a model which seems to be functional, but one Level var gives me an error. it sais that the var is not used in the model.
How should I make it functional? And how could i create charts that reflect the real situation of the var to be displayed?

[LAUJJL]

Vensim checks if all the variables are used that mean if the variable is influencing some other variables and report it. To stop Vensim to warn you , just check the supplementary case in the equation editor.
J.J. Laublé