Another function of the pre-scan analyzer is the ability to look for multiple computer entries in the list of network computers. If there is one hostname listed multiple times with different IP addresses, then there is a chance that the data collector will not be able to scan that machine. The cause of this is stale DNS records. Be sure to print out the results of the pre-scan so that you can take notice of why computers can't be scanned so that you can make arrangements to scan them at a later time if need be.
