When you have a large Reporting Engine List and use the list to populate data in an investigator it will fail due to URI character limitation.
This has been resolved in RSA NetWitness version 11.1 and will be resolved in RSA Security Analytics version 10.6.7. In the fixed version, we have a limit of 8192 characters to store this list. If the list goes outside of this range, we throw a limit exception. This limit value has been set based on performance testing. If the list has exceeded this limitation, it is suggested to re-evaluate how and where the list can be split.