Problem

In OMNIbus 7.2.0, the generic_clear trigger does not work if the value in the AlertGroup field is greater than 64 characters.

This is fixed in 7.2.0.6, released June 2009.

Solution

In an existing installation this can be fixed by increasing the value of AlertGroup to 255.

Perform this from the nco_sql command line with the command:
alter table alerts.status alter AlertGroup set width 255;