| Description | Type | Default | 
|---|---|---|
|  
				   Nonlinear solver iteration acceleration option. Controls nonlinear iteration acceleration, damping, and line search algorithms. There are six options: 
 See the NLPARM Bulk Data entry in Section 4, Bulk Data, for additional line search parameters.  | 
 
				   0 ≤ Integer ≤ 4 ON/OFF  | 
 
				   4  |