>Hi Barbara and Jim,
>
>I still do not understand why the ISO error goes away if I simply choose to ignore it. Also, the error is not consistent -- it occurs only sometime. It is strange.
>
>Chen

Chen,
There are many causes for the ISO error. Often your entire system will crash. If you have an occasional problem, it may be caused by hardware which is having problems - network cards, cabling, hubs, etc.

HTH
Barbara