ORA-16792 configuration property value is inconsistent with database setting

As per the reference this error literally means:

Cause: The values of one or more configuration properties were inconsistent with database in-memory settings or server parameter file settings. This may happen by altering initialization parameters directly instead of altering property values using Data Guard broker.

Actions: Query property the InconsistentProperties on the database or check the Data Guard broker log to find which properties are set inconsistently. Reset these properties to make them consistent with the database settings. Alternatively, enable the database or the entire configuration to allow the configuration property settings to be propagated to to the initialization parameters.

When the dataguard broker was queried about the status, it showed the following results:

DGMGRL> show configuration verbose

Configuration - OMCDG1120

  Protection Mode: MaxPerformance
  Databases:
    OMCPRO - Primary database
    OMCADG - Physical standby database
      Warning: ORA-16792: configurable property value is inconsistent with database setting

  Properties:
    FastStartFailoverThreshold      = '30'
    OperationTimeout                = '30'
    FastStartFailoverLagLimit       = '30'
    CommunicationTimeout            = '180'
    FastStartFailoverAutoReinstate  = 'TRUE'
    FastStartFailoverPmyShutdown    = 'TRUE'
    BystandersFollowRoleChange      = 'ALL'

Fast-Start Failover: DISABLED

Configuration Status:
WARNING


The parameter involved in this particular case was  db_file_name_convert, the paths defined at the spfile were different from those known to the Dataguard Broker. db_file_name_convert is a static parameter which means the standby database had to be restarted so the parameter was effective.  The actual actions that took place to solve this issue were to set the parameter at the database level and modify the value at the dgmgrl prompt.

Step 1. Modify the instance parameter.

alter system set db_file_name_convert='C:\Oracle11g\Oradata\OMCPro', 'J:\Oracle11g\Oradata\OMCDG', 'D:\Oracle\Oradata\OMCPro', 'D:\Oracle\Oradata\OMCDG' scope=spfile;

Step 2. Modify the parameter at the DGMgrl prompt

C:\> dgmgrl

DGMGRL> edit DATABASE "OMCADG" SET PROPERTY DbFileNameConvert = 'C:\Oracle11g\Oradata\OMCPro, J:\Oracle11g\Oradata\OMCDG, D:\Oracle\Oradata\OMCPro, D:\Oracle\Oradata\OMCDG' ;

Property "dbfilenameconvert" updated

Once the parameter is consistent both at the spfile and the Dataguard broker it updates its status to SUCCESS.

DGMGRL> SHOW CONFIGURATION VERBOSE;

Configuration - OMCDG1120

  Protection Mode: MaxPerformance
  Databases:
    OMCPRO - Primary database
    OMCADG - Physical standby database

  Properties:
    FastStartFailoverThreshold      = '30'
    OperationTimeout                = '30'
    FastStartFailoverLagLimit       = '30'
    CommunicationTimeout            = '180'
    FastStartFailoverAutoReinstate  = 'TRUE'
    FastStartFailoverPmyShutdown    = 'TRUE'
    BystandersFollowRoleChange      = 'ALL'

Fast-Start Failover: DISABLED

Configuration Status:
SUCCESS