Errors while running Pre-Upgrade Checker

Last week I was doing another test migration using the database - attach method. This time we were trying to simulate a multi-server farm environment.
Before upgrading, as usual :) , I ran the pre-upgrade checker on the SharePoint 2007 test farm we had created. But it returned several unfamiliar errors!

We found out by checking many things regarding permissions the following two were the reasons for causing erroneous reports.

• Additional inactive server in the farm
• insufficient permissions to continue

 This was later resolved by,

• removing the additional inactive server from farm
• re-running the pre-upgrade checker using a more privileged account

These errors occur due to misplacement of simple issues. But these things happen when we are thinking only about the big things and not concentrating on small details. Hope this will help a wanderer :)