In the NSX Manager UI, if you browse to Security -> Gateway Firewall -> All Shared rules and try to view statistics for any of the rules, you will see the following error:
"Error: General error has occurred (Error code: 100)"
When a gateway rule is applied to more than one Logical Router, then while trying to fetch the statistics of that rule an error is thrown.
Please see the below screenshot:
VMware NSX versions 3.2.3.x and prior
VMware NSX versions 4.1.0.x and prior
The issue occurs due to a bug where an invalid section/rule combination is queried while fetching the statistics.
This issue is fixed in NSX versions 3.2.4 and 4.1.1.