Program: 75193
Project: 75193
Buggy source:
/** 
 * Construct a ModelReference with a name and a container. The container argument must not be null, or a NullPointerException will be thrown.  This actor will use the workspace of the container for synchronization and version counts. If the name argument is null, then the name is set to the empty string. Increment the version of the workspace.  This actor will have no local director initially, and its executive director will be simply the director of the container.
 * @param container The container.
 * @param name The name of this actor.
 * @exception IllegalActionException If the container is incompatiblewith this actor.
 * @exception NameDuplicationException If the name coincides withan actor already in the container.
 */
public ModelReference(CompositeEntity container,String name) throws IllegalActionException, NameDuplicationException {
  super(container,name);
  modelFileOrURL=new FileParameter(this,"String_Node_Str");
  executionOnFiring=new StringParameter(this,"String_Node_Str");
  executionOnFiring.setExpression("String_Node_Str");
  executionOnFiring.addChoice("String_Node_Str");
  executionOnFiring.addChoice("String_Node_Str");
  executionOnFiring.addChoice("String_Node_Str");
  lingerTime=new Parameter(this,"String_Node_Str");
  lingerTime.setTypeEquals(BaseType.LONG);
  lingerTime.setExpression("String_Node_Str");
  postfireAction=new StringParameter(this,"String_Node_Str");
  postfireAction.setExpression("String_Node_Str");
  postfireAction.addChoice("String_Node_Str");
  postfireAction.addChoice("String_Node_Str");
}

Fixed version (ground truth):
/** 
 * Construct a ModelReference with a name and a container. The container argument must not be null, or a NullPointerException will be thrown.  This actor will use the workspace of the container for synchronization and version counts. If the name argument is null, then the name is set to the empty string. Increment the version of the workspace.  This actor will have no local director initially, and its executive director will be simply the director of the container.
 * @param container The container.
 * @param name The name of this actor.
 * @exception IllegalActionException If the container is incompatiblewith this actor.
 * @exception NameDuplicationException If the name coincides withan actor already in the container.
 */
public ModelReference(CompositeEntity container,String name) throws IllegalActionException, NameDuplicationException {
  super(container,name);
  modelFileOrURL=new FilePortParameter(this,"String_Node_Str");
  executionOnFiring=new StringParameter(this,"String_Node_Str");
  executionOnFiring.setExpression("String_Node_Str");
  executionOnFiring.addChoice("String_Node_Str");
  executionOnFiring.addChoice("String_Node_Str");
  executionOnFiring.addChoice("String_Node_Str");
  lingerTime=new Parameter(this,"String_Node_Str");
  lingerTime.setTypeEquals(BaseType.LONG);
  lingerTime.setExpression("String_Node_Str");
  postfireAction=new StringParameter(this,"String_Node_Str");
  postfireAction.setExpression("String_Node_Str");
  postfireAction.addChoice("String_Node_Str");
  postfireAction.addChoice("String_Node_Str");
}