[Dsol-java] Still question

[Fu C. <col...@ho...>]

Hi everyone
I still got the problem in my model. The dsol Logger shows that 
nullPointerException in the line 144 of my Factory class. Here are the code 
of line 144:

this.inventory[(int)productType.draw()]=this.inventory[(int) 
productType.draw()]+1;

But Acually I already initialize inventory array and productType in the 
constructor of Factory class. I guess the problem might be productType cuz 
I use "switch"-"case" to initialize the productType. Following are the 
codes
switch(factoryNumber)
		{
			case 1:
				this.productType=new DistDiscreteUniform(stream,0,5);
				break;
			case 2:
				this.productType=new DistDiscreteUniform(stream,6,11);
				break;
			case 3:
				this.productType=new DistDiscreteUniform(stream,3,8);
				break;
			case 4:
				this.productType=new DistDiscreteUniform(stream,1,8);
				break;
			
			default:
		}
Can any one help me? My model is comparison 14 on CVS. Loek, last time your 
suggestion is correct.Thanks.
Kind Regards
Hualiang