| Description | Type | Default | 
|---|---|---|
|  
				   Delta strain energy output option. When set to ON, the residual strain energy vector is output. The residual strain energy vector is calculated using: 
 where, u is the global displacement vector P is the global load vector K is the global stiffness matrix The solution error measure, epsilon, is calculated using: 
  | 
 
				   ON/OFF  | 
 
				   OFF  |