Model is unsuitably constrained (i.e. there were still some variables left to be computed, and some unusable equations left over).
At the time of the error, the following variables were found:
 * Undefined: Emax in component EAtrium
 * Undefined: Emin in component EAtrium
 * Undefined: T in component EAtrium
 * Undefined: Tpwb in component EAtrium
 * Undefined: Tpww in component EAtrium
 * Undefined: E in component EAtrium
 * Undefined: t in component EAtrium
 * Undefined: mt in component EAtrium
 * Undefined: et in component EAtrium
The following equations couldn't be used:
 * Equation with no id on the apply or math element.
 * Equation with no id on the apply or math element.
 * Equation with no id on the apply or math element.