The following error can be seen within the PCService.log after running the CAPC report "Routers with the Most Flow Traffic" against an NFA data source:
Release : 3.7
Component : IM Reporting / Admin / Configuration
The first thing to attempt with behaviors such as this is to prompt a FULL synchronization with CAPC and the NFA Data Source. This can be done within the CAPC Data Sources window after selecting the NFA Data Source.