How to Disable the Filter Optimization Feature in Neverfail Heartbeat v6.7 Using nfcmd Commands



This Knowledgebase article provides information about the occurrence of an error when deployed in a Tertiary configuration that can prevent making the 2nd passive server active in some circumstances.

More Information


When Neverfail Heartbeat is implemented in a tertiary configuration, Filter Optimization may lead to an unexpected InterceptorException: Invalid filters: One or more patterns are duplicate


The filter optimization added in Neverfail Heartbeat v6.7 may fall foul of a filter check in Filters. It checks to ensure that the same pattern does not appear twice, but with optimization it is possible to have an identical sub pattern in the Excludes and the Includes. This can be avoided by setting Interceptor OptimiseFilters to false.


  1. On the Active server, navigate to Start > Run , type cmd and press Enter .
  2. In the command window, navigate to <Neverfail_HB_Installation_Dir>\R2\Bin
  3. Enter the following command and press Enter :

    nfcmd localhost setpe Interceptor OptimiseFilters false

    Note : The command above must be executed by a Trusted Client. For more information about Neverfail's Trusted Clients, see Knowledgebase article #1724 .
  4. Close the command window.
Applies to

Neverfail Heartbeat v6.7 when deployed as a Trio

Related Information



0 out of 0 found this helpful



Please sign in to leave a comment.