SQL Nexus FAQ
Q:Can nexus import data collected from multiple instances by pssdiag or sqldiag?
A:Nexus only import data for one instance at a time for simplicity. If the directory you specify contains data collected for multiple instances, SQL Nexus will detect it. It will present you with a choice on which instances to import. When import for one instance
is complete, you can create a new database to import data for another instance into that database. Then you can run reports on those databases.