displays the absolute maximum value of model equations if it is above a threshold
rhs_minus_lhs(model,dbmat,boun,tol)
* model = a model tlist
* dbmat= a tsmat, representing the database associated to the model
* boun = a [2 x 1] string vector, the bound over which to perform the calcualtions
* tol = a scalar, the tolerance criterion
* nothing : results are displayed on screen